I don’t think anyone should ever do a sport for what it might be in the future. The sport should be done for what the child gets out of it NOW. Of course there are times when someone might choose to play at a higher level because he wants to play at the next level, but really the child should be enjoying things about the sport (or any activity for that matter) because it brings him pleasure at the time.
I have one child who is a college athlete, but she didn’t think she wanted to play in college until after her junior year in high school. I’d asked her when she was a sophomore if she wanted to play in college and she said no, so she didn’t go to any of the summer recruiting camps, tournaments or showcases. When she decided she wanted to play, it was a big scramble to get film and records and other things, but it all worked out.
If he doesn’t like swimming or doesn’t see the benefit, don’t continue because of the ‘points’ it will earn toward college admission.