That for me was the greatest life lesson from that time.
Also how there was all these poker strategy books but I don't remember a single one trying to model the strategy of the rake and how to determine if the rake made a game unbeatable. Basically, assuming all games at all levels of rake are beatable.
How convenient for the house.
Once you consider what the house earns, poker is a net negative for the players. In order for there to be some big winners, there have to be a lot of losers. And a shocking number of those losers will, thanks to our selective memories, consider themselves winning players.
Not a poker player, just thought that was a thing.
Zero-sum nature of the game aside, Meta developed an AI that wins consistently at poker, so it is possible to be good at poker and win consistently. https://en.wikipedia.org/wiki/Pluribus_(poker_bot)
I took that to heart and it has served me well in life.