Depends on the work. I've worked places (military intel) where you leave work at work, simply because it is impossible to take work with you home. Some of the people I worked with said that was exactly why they chose that line of work - so that they never had to think about work when they came home. Some of those were also top performers.

But I also knew other top performers that basically had geopolitics as their hobby, and would study OSINT (open-source intelligence) when they came home.

And obviously there are many other professions where you can do really well, and don't think a second about work when your day is over. Really depends on how your work is structured!