I noticed Yacht joined in September. If he hasn’t heard the pitch it’s time for it ...
”Don't fret over what you can’t control. Focus on what you can control.”
Your son is being required to make the run. He can’t change it. You can’t change it. He has to run regardless of what anyone on this board thinks. What can be controlled is preparing for the run to be ready to run the best time possible. If there’s a concern he could get cut for not running fast enough stop complaining. Get out on the road and run.
My son also played high school soccer. Summer sessions started every day (for two weeks) with a five mile run. They were required to finish in forty minutes. He didn’t bitch he was a goalie and didn’t need to run much. As soon as summer baseball ended he ran five miles every day.