I agree with that in principle. The problem is that you have to do those sports a lot in order to stay fit, and people start companies, write books and do othe

I agree with that in principle. The problem is that you have to do those sports a lot in order to stay fit, and people start companies, write books and do other things that leave them with too little time for it. Climbing over a lifetime beats weightlifting, but weightlifting beats sitting in a chair for two years. Also, olympic lifting might look like brute force, but it's actually as tricky and interesting as swimming or gymnastics.