Knowing that the host hires teenagers, it is possible that In-ho worked for him in the 80s after the mother died?

A big question is why he completely changed his view on humanity even though he was already a grown man. We know he lost his wife and son but that wouldn't justify his change. So I think there's more to it. When Frontman says that the game will only end when the world changes he seems to be convinced that the big blame for those people getting into debt is their own.

In-ho was born in 1976 and Squid Game was created in 1988 when he was 12 years old. And perhaps he started working for Ilnam after he lost his mother and before he went to live with Jun-ho's mother. We know from the guard 011 that she received an invitation to work on the games, she was not forced into it. The same may have happened to In-ho. He decided to leave his job of collecting bodies and was adopted by his father's new family, but fate made him resort to games again and made him believe that that place was fairer and that it only existed because there were fathers addicted to gambling.

The recruiter claims he has been working in games since he was a kid and his father was a debtor who went into gambling and he hated it for some reason. There are high-ranking soldiers who are just out of their teens—a hint that they have been serving there since a very young age.