Despite what my personal opinion is on this whole COVID-19 situation and how this is handled worldwide, the fact is that as a responsible flight school you should not continue your operations. CAE Phoenix only started to take some cleaning measures a few days ago and they still allow training flights with both student and FI's sitting in a confined space together. Instead of closing down their ops temporarily they are letting the choice to fly or not to fly up to both students and instructors. They are trying to let students return home (at own expense of course) which they in fact prefer as they are dealing with severe training capacity constraints in PHX and this would give them a temporarily relief. The question is not if remaining open is acceptable or safe to do so, because that doesn't even matter nowadays. In these times it would be irresponsible as a company to keep on doing as if nothing is happening. The public opinion is very strong and they will decide what is acceptable or not. At the moment they say they are considered an 'essential' company or service, but is it? Nobody is waiting for these pilots to finish their training because there are no planes to fly with now, so of course this is not essential in these times
In Europe CAE did already close training facilities etc, so no point in rushing the flight training.