College age kids who play sports are not filling up our hospitals right now. Far from it. There have been way more flu deaths and hospitalizations for people under 24 than covid deaths and hospitalizations. We don't shut down sports for the flu.
So, the only reason to not play sports due to covid is if you are worried that by playing sports you markedly increase the chance a player will spread the virus to a person over at least 24 as compared to the chance of him doing so if we don't play sports.