None of this happy talk is consistent with what we are seeing in similar environments -- meaning indoor, prolonged exposure, limited distancing.
Retailers have been pretty successful as stemming new infections, but food processing plants, nursing homes and, most recently, reopened churches are seeing big increases in infections.
If you are in a small, poorly ventilated room with a group of people for over an hour 30 times, I would imagine the risk is nontrivial if you are 50+ or have chronic medical conditions.
There is obvious mitigation you can pursue. Masks for students, filters, no handshakes, etc. But if 30 hours over a semester this fall, at a distance from students, is too dangerous, then I assume you think the same is true for other workers *currently* working 40 hours per week indoors. I take it you are not offering off Amazon, or any delivered food, or expecting any government services?
Honestly, the willingness of academics to make a huge sacrifice to educational quality is exchange for a minor health benefit (and again, the health risk of teaching in September is incomparably lower than delivering mail in May) is surely based on the fact that they do not bear the costs. A 50% reduction in salary if we go online, to be able to match tuition at full time online programs? Who supports that? I sure as hell don't.