I really don't see why shuls can't be open, as long as appropriate precautions are put in place, and someone is put in charge of actually enforcing them in each shul. Is it so crazy to force everyone to wear gloves and mask if they want to come in? Direct people to specific seats so as to spread people out? Everyone bring their own siddurim? No one over a certain age, and no one experiencing any symptoms? No one who needs to be quarantined due to necessary contact with elderly/immunocompromised people? Etc, etc.
Schools unfortunately would be impossible to do something similar.
ETA: Before anyone jumps on that, I fully realize that most places that are open aren't actually doing all these things. But that begs the questions, why not? And why can't places that are closed institute such things and stay open?
We tried that... over a 1-week period we implemented more and more extreme measures what we had to give up.
We have a minyan in the parking lot now.
P.s. we couldn't get hand soap in sufficient quantity and 0 hand sanitizer.