There are obviously significant health/safety concerns that will drive all of this ultimately. I worry even about games without fans, given how easily this spread across the NBA. That's a liability thing that I'm sure no school/conference/league wants to take on.
I'm sure there are dozens of contingency plans being discussed at high levels, this was just one that seemed to jump out to me as seemingly feasible from a "enough time to get treatments, etc. in place" perspective, and from a logistical standpoint.