I guess because they also learn there’s still plenty of money to be made in other engineering domains.
And to be honest, I think games are a good stepping stone towards a career in software engineering / computer science. Especially back in the day when getting a game to run required you to mess around with the computer haha
My first real interaction with a computer in any technical way was trying to get Age of Mythology to work after I lost my activation key. I won't say that I miss those experiences, but they were foundational as h*ck for me.