Depends on what we are talking about as overkill. The 2-3 weeks missed due to contact tracing depending on the conference, even with multiple negative tests? Yes. The less than .12% chance of death for these students athletes because they wouldn't be playing if they had a co-morbidity? Probably. Coaches, hell yeah, protect them, especially the older ones.
Just because there are exceptions to a rule does not mean the rule shouldn't or doesn't exist.
Also, "slowing the spread" did not mean that this would never spread. The end number was never predicted to change, it just meant it would take longer to get to that number. Like instead of driving 50 mph to go 50 miles, we slow to go 10 mph to still go 50. People will get this thing one way or another. Doesn't mean precautions shouldn't be taken.
And for that less than .12% stat, if anyone hasn't seen me post it, is based on the CDC report from months ago that only 6% of deaths (and this is saying all deaths are actually due to Covid, which spoiler, they aren't, Illinois and New York have admitted as much) have no co-morbidities and as of this morning John Hopkins University shows only 2% of cases ending in death (it's been decreasing for months, I assume that number for the last few has been well under 2% as the 2% is a mean). What is 2% of 6%? .12%.
In summary, depending who we are talking to, there may or may not be overkill. It may also depend on the policy. IF you are going to name people who mathematically are exceptions, then you are advocating for full on lockdowns because the only way to avoid anyone from getting this thing (and this may not work for apartment buildings due to circulated air), is to shut everyone down, no one in, no one out for at least a month. If the precautions, which may or may not be overkill didn't stop them from getting it, nothing would other than the above. If you are not advocating those lockdowns, we have to accept that this thing will spread and people will get it. Not that we want them to, but if you leave your house, you are making the knowing decision anything you do could expose you. The rules aren't the reason your exceptions got the virus. Their choice to leave the house is.