I think that there is a difference in a P5 athlete and a successful member of any of the special forces that make up our military, (As a former Marine I do not include all Marines in this description. Force Recon and a few other units fit though.) That is that being a successful P5 athlete requires genetics not required for special forces. Although running a 4.5 40 may help you on a battle field. It is not a requirement. It is at many positions as a P5 athlete. No matter how much you may want to do well. If you are not blessed with those genetics. You can only go so far.
Conversely to challenge.
@ShortSideOption a little bit. 13 week bootcamp is only the basic requirement. Just like in Football the training continues endlessly throughout your career. to back up
@ShortSideOption though. You would not expect a guy coming right out of Marine Corps bootcamp to go straight to Force Recon and keep up with a SGT who has been doing it for 8 years.