Most of those other diseases aren’t nearly as contagious. Many of those other diseases we don’t have an easy solution for. None of those other diseases were something that we shut down normal operations for months over. Very notably, we don’t have any diseases in recent memory that had a risk at completely overwhelming our hospital system if not dealt with. Small percent chance it may be, but while it is no spanish flu, Corona is still many times more dangerous than the flu, especially on a wide spread level.
For the vaccines we do have, public schools in most states already require vaccination. Almost every state already requires that children in public schools have the DTaP, IPV, MMR, Varicella, and HepB vaccines to enter Kindergarten. And I would personally have no problems spreading those and the flu shot as a requirement in the same vein as I stated above either.
We are indeed mammals that are walking bags of filth, but we also have minds that we can use to help deal with that fact. We can’t indefinitely contain, and we can’t completely stop transmittable illness. But coronavirus is one of the handful of diseases we now have a tool to deal with, and not taking advantage of that tool to stop needless death and waste is a massive dereliction of duty to one’s fellow man. This isn’t about “not letting anyone die ever from transmittable illness,” this is about a specific dangerous disease that we have invented a tool to help stop.