This also includes the message of the older generation building a better world for future generation/generations and for paying for the sin.

According to HDH, season 3 (the ending) was not a tragedy, and it was a happy ending just because it has a hopeful message about not wanting to lose faith in humanity in Korea even in a difficult reality.

to someone who didn’t care about Gi-hun, including his crew that all die (except Kim), and whose goal wasn’t to save the people in the games since he doesn't care about them either, but just to bring his brother home.

This is also why HDH changed Jun-ho from someone who cared about Gi-hun and helped stop the games with him and his crew, saving the baby and a few other major characters,

In the original ending, it actually makes sense of how capable Jun-ho is, but you know, HDH scrapped that to convey a message for us and for Gi-hun to pay for his sin of killing Dae-ho, not for a realistic setting/ending. Remember that.

Here, Gi-hun is the reason why In-ho ended the games, not Jun-ho, which makes everything sad because it means the credit many people, myself included, gave to Jun-ho... means nothing.

Okay, so I was wrong about what I said up there. In-ho would've blown up the island either way, even without Jun-ho's interference.

HDH does know that he butchered Jun-ho's character arc and will make him useful in a future spin-off. (Yes, I do know that Jun-ho ended the games when he called the coast guard, but there are people who were disappointed with his arc.)

HDH purposely made Jun-ho come to the island late to become the adopted father for the baby.

Here's what HDH said in an interview about the final scene.

Honestly, if HDH was having all that trouble wanting someone to be shocked by the fact that the American games exist, why not stick to his original ending and have Gi-hun witness it instead of retconning the literal frontman?

Fortunately, despite LBH's confusion, he ultimately adopted the tone HDH wanted, which was to make In-ho feel a sense of bitterness and the final realization that the games were a global, never-ending operation.

Which left LBH confused since his character already knew about the other games unfolding in different countries by having inherited the operations from Oh Il-nam and hearing VIP 3 mention, "The contest in Korea was the best," in season 1.

Since HDH made In-ho have Gi-hun’s original ending, he retcons In-ho’s knowledge to be somewhat like Gi-hun’s, making him unsure if the games existed worldwide, at first thinking they were just rumors until he was in Los Angeles and was genuinely shocked to see concrete evidence.

However, HDH scrapped it because if Gi-hun saw the American recruiter, he'd try to stop the American games. In that case, he could’ve rewritten the script so Gi-hun chooses his daughter instead, since he already did everything he can.

But it would've been such an impactful ending if Gi-hun discovered the games were still happening elsewhere since he obviously doesn't know, and originally, he was the one who spotted the American recruiter.

(Even though when people saw V.I.P. 3 say, "The contest in Korea was the best" from season 1, it instantly clicked in their minds that the games were worldwide, making the ending not impactful.)

HDH stated the ending was impactful because it was meant to confirm the games are global.

and had no diaper changes; the baby never peed or pooped. The reason? HDH didn’t bother with realistic behavior and realistic childcare. He only intended the baby to be just a symbol, not an actual human being.

We all know that Jun-hee giving birth was poorly portrayed; her labor lacked mess, and there was no placenta shown. Her broken ankle was treated as more painful than childbirth, but her daughter never cried all the time, even at bedtime, only drank twice,

Plus, Gi-hun was a seeker; if he didn’t kill someone, the guards would’ve killed him instead.

he still needs to pay for the sin of what his broken self did, which is just messed up. He already showed remorse for what he's done and was ready to kill himself.

Or that Gi-hun killing Dae-ho wasn’t really him; it was his psychotic state driven by rage and self-blame. And now that he’s back to normal,

Also, if that's part of the reason why HDH altered Gi-hun's original ending, why not change the script? Have Hyun-ju defend Dae-ho when Yong-sik accuses him of failing to get the ammunition since she literally saw the state Dae-ho was in at the end of the failed rebellion.

HDH needed to purposely kill everyone off just for Gi-hun to redeem himself from that sin by sacrificing himself for the baby, which was the most fitting conclusion to Squid Game.

In the Squid Game in Conversation, HDH talks about why he changed Gi-hun's original ending (which is in 4:18 - 5:13 btw) because, in other words, since Gi-hun commits an irreconcilable original sin from killing Dae-ho,

youtu.be/Gs_Vy6IOyrg?...

And it's not just the older generation pushing for change. Plenty of others, including those who are getting older themselves, are part of the effort too. Progress isn't just one generation's responsibility.