I think you're right - outside of COVID, it's not fringe, it's an accepted norm.

Personally I at least wish sick people would mask up on planes! Much more efficient than everyone else masking up or risking exposure.

Oh I wish sick people would just not get on a plane. I've cancelled a trip before, the last thing I want to do when sick is deal with the TSA, stand around in an airport, and be stuck in a metal tube with a bunch of other people.