Much will depend on your PMS. Some are supportive, but unfortunately some are not.
It is probably apocryphal, but by oral tradition the Duke of Wellington is said to have remarked that “the Battle of Waterloo was won on the fields of Eton.” George Orwell retorted “…but the opening battles of all subsequent wars have been lost there”, but that’s besides the point.
As West Point football players take the field in Michie Stadium they touch a plaque on which is written, “I want an officer for a secret and dangerous mission. I want a West Point football player.” It’s attributed to General Marshall, but as with the reference to Wellington there is no evidence he actually said that.
But the sentiments have value. You learn things about leadership and “followership” on the playing fields that you just can’t learn in a classroom. I learned much more on the lacrosse and football field about life, leadership, and working together than I did in any classroom.
Physically you will be in better shape as an athlete than the vast majority of PT programs. Even as a D3 athlete I thought basic training was physically pretty easy compared to preseason “two a days”. My daughter was a D1 athlete and physically smoked basic training. Many ROTC programs exempt you from PT during season. SA athletes do not participate in company athletics or PT in season. Heck, most mornings my DD was in the weight room before the rest of her company was awake.
But beyond the physical aspect there is the leadership aspect. It may be cold, drizzling, sleeting, but you still have to play. Heck, I played in conditions that caused field problems to be cancelled.
You may not like that player next to you, but you have to learn to work together. When the other team scores you can’t give up. When you lose, you wake up the next morning and hit the weight room again.
So I would go for the athletics if you can. Years from now you will be happy you did.
Now if you’re talking golf… I’m sorry, but that isn’t a sport.