@MWolf Duke and Brown are going to look for the full picture that makes sense. The Common App not not only asks what possible majors, but what future career ideas. OP has said premed. He’d need, imo, to twist himself into a pretzel to pretend he isn’t stem- and still, lifeguarding, bodybuilding, and camp aren’t it. Other than the sport and NHS, he seems to have little involvement with peers in school. No other clubs.
Working on the side with special needs kids is good, a job is good. But, not enough to show the full picture.
Does he still have a shot? Yes. But I believe CYA, leaning in, is the safer bet.