Well, it does not merely supports those things. It almost coerces you into them. There are few ways to get enough money so you can live. I would not work the same 8h/days if I could.
> it's what you are on this planet to do
Not at all. I'm here for no reason. Now that I'm here, I'll optimize happiness while creating as little harm as possible to others.
Doing sports would at best be a means to this happiness if it helps me feel better, longer. Even knowing it is not quite enough to like it and be motivated to do it enough. I say this as someone who likes hiking, does most of their trips by bike, and runs regularly, as long as I'm not too tired and it's not extremely hot or cold outside.
I don't like practicing, and I won't lie to myself about it. I only do it because I believe it makes the rest of my life better. I guess considering it as essential helps indeed, but that's a very abstract idea, to be honest.