That would make sense if asymptomatic spreaders only spread to others who also would be asymptomatic. But because there is such a wide range of reactions to the virus, they might give it to someone whose body reacts much more severely. Or it could reach a spouse, trainer, other team employee, etc. who is particularly vulnerable.
If you're particularly vulnerable, you need to stay out of the way. If you're not, you need to go on about your business.
The most asinine thing about how this has been handled generally is that we've treated all of society as though they're at significant risk rather than just the people who are actually at significant risk.
I have a son who, before having tonsils and adenoids removed, was extremely vulnerable to influenza. He was admitted to the hospital twice with it. So when it was flu season, we protected him in particular. We did not ask that everything else shut down the moment someone got the flu. Because he was uniquely vulnerable.