Sure, but it's circular logic to suggest that there's no need to rush reopening since demand will be low anyway... (As others have said)
When you need those jobs created by reopening to get people back to work and closer to the point of having disposable income again.
This isn't pure chicken & egg, since consumer debt is tightening up while business debt is getting cheaper. Plus the only way we're going to alleviate fear is by opening and seeing what happens.
Even testing vaccines will require that leap of faith at some point. After all, what good would a clinical trial be if the patient quarantined during it?