Is short lived feel good chemicals all that matters? Doesn't sound like a healthy life philosophy to live by.
Why is living with an aim of happiness and contentment unhealthy?
It's one thing to talk like this to somebody you know, but randomly speculating about how somebody you'll never meet might be living a lifestyle that you don't approve of is without question a less worthwhile activity than playing video games.
As long as a person doesn't hurt others with how they spend their time, who are we to judge?