Being smart doesn't mean they know everything. They would probably get it if they read up on it, but not every gamer reads up on the health effects of a sedentary lifestyle, etc.

I get that people have different hobbies. My primary hobby is gaming. I'm introverted. I enjoy working remotely. I like my job, but I'd still quit if a passion project could support my life.

If I were stagnating by spending all of my time with hobbies and not improving myself or my future, I'd hope that someone would help snap me out of it.