Mine doesn't get a choice. He gets plenty of time to potter and a (rationed) amount of screen time daily, but he also needs exercise and fresh air, which isn't optional to my mind.
I have a friend of whom I am very fond, but his homelife seems to consist entirely of him on his computer in his study, his wife at her obsessive craft hobby in another room, and their two sons, 10 and 12, playing computer games downstairs. They never go anywhere at weekends, the children only leave the house to go to school bar the very occasonal playdate, get no physical exercise outside of school PE, and their holiday this year consisted of them lying all about in an apartment in another country, all apparently wishing they were back at home so they could get on with their usual stuff.
Horses for courses you might say -- and I get that some people are homebodies and creatures of habit by preference. It's just that my friend and his wife (healthy, late 40s and early 50s) seem to regard doing anything outside of the house as being a terrible faff and a major effort, and there's a lot of sighing and exclamations of exhaustion and relief at surviving a brief shopping expedition to the shops in a nearby city or IKEA as if they're just finished the Paris-Dhakar rally.
And the children are absorbing this as normal, that you only leave the house if you really have to, for work or school, and any brush with the outside world is to be minimised and greeted with a 'Whew! Survived!' sort of attitude, even if you've only gone to the supermarket to buy frozen peas.
This is an extreme example, but I think a certain amount of physical activity etc is a good habit to form.