The risk they accept usually means that they might have to find new tenants or replace stuff. Your tenant won't pay what they agreed to? Now you have to find a new tenant.

But right now we want them to not kick out people who can't pay. We want them to provide free housing to tenants who need it. Those are the landlords we want to bail out. Asking them to just take that as a loss is shitty.

(I assume that the landlords who don't forgive rent don't get to claim this loss on their taxes.)