Perhaps the teachers in your family are different, but the ones I know haven't really made this always about them- unlike many other professions, where social distancing is very easy to establish, you just can't do that in many classrooms currently.
The average number of students safely able to occupy a classroom while distanced, is 10-15 depending on size. Ask all your teacher folks how many of their classes are actually adhering to that number. My guess? 0 in most populated regions. All the teachers I know just do not have the ability and space to socially distance all students, and themselves.
Let's not sugar coat this - they are at risk. There's nothing wrong with criticizing policy makers when you are at risk.
As I originally suggested, the teachers absolutely have legitimate concerns. And of course, they are at risk. But the ones we know, they never care about the restaurant workers dealing with hundreds of patrons a day, the grocery workers putting food on the shelves for all of us with people flowing in and out constantly, or the retail workers (like my wife) who deal with numerous customers daily, many of which themselves don't adhere to physical distancing rules. Nope, for teachers, it's all about, "How am I supposed to keep 15 kids apart." Which was the basis of my point about thinking about themselves, and really, not about anyone else (granted, I find that is the case about a lot of things work related).
Again, I'm not disputing teachers as a whole have difficult jobs. Even moreso during the pandemic. But you mention to them about teaching from home -- nope...an absolute gong show. Hybrid method -- nope...double the work. In class -- nope...tough to maintain physical distancing. Then they'll say they want the government to get their sh!t together, and that they should delay the start of the school year until everything is properly set up. Sure. But as soon as someone retorts back, "Well, if you're not going to work, you should all be temporarily laid off and put on CERB just like all the other people who couldn't work because of the pandemic." Of course, that doesn't go over well with them either.