Substitute "football" or "drinking with friends" or other outdoor activities for the videogames here. Or "reading a book". It's all the same thing. It's natural for young people today (at least those in more well-off places) to spend absurd amounts of time in a way they later on may consider waste. It's natural for adults to spend some time like this too. We call this entertainment - stuff you do for fun.
Grass is always greener, but you'd probably burn out if you tried to spend those thousand of hours working in your economical self-interest instead. If you were doing something else for fun instead, you could be regretting that today, wishing you played some videogames a bit more. And even if you wouldn't, you would be a different person. The time you spent on videogames - the experiences, the stories, the people - are a part of you right now. And it's not like videogames are unique in enabling escapism; if you look around, plenty of people are escaping from their lives into books, or sports.