I agree with all that, but surely if they don't have any wiggle room to offer grace they don't have wiggle room to let the property be vacant for 6+ months, by which time there will inevitably be a glut of supply on the market.
It seems to me that any landlord who understood the economic situation would work with tenants to keep them on paying something, even if they couldn't afford full rent. I expect landlords will end up better economically in the end that way.