Such a wrong mindset... but you do you, don't complain later when inevitable comes, its not like there haven't been hundreds of millions of folks who made similar life decisions and we can easily see what it leads to (or doesn't).
One example out of sea of examples - climbing. Indoor, outdoor, bouldering, long walls, doesn't matter. Its an amazing activity, every single person I know is doing it at least occasionally becomes much happier during&after a session. Massive health benefits could be just a side effect and it would most probably still be the best and most memorable thing you did on that day.
Plus people in community are generally very positive, welcoming, helpful and happy to talk to. Its sort of sport that changes you in many ways for the better (healthier, happier, better life perspective and so on). How much time it takes is sort of irrelevant, ie coming and commenting here costs you probably more time than continuous amateur climbing career would do.
Change climbing for many other sports and it would still be true.