For the SUM of your tenants' rent to pay for your mortgage and most of the upkeep? Probably fair.

For ONE tenant to cover the whole mortgage? Geez, that's not nice, to put it softly.

I don’t think just because people are landlords that makes them bastards though. We’re letting a house out and I think we treat our tenants well. We don’t rip them off, we fix stuff when it’s broken, and since we have a fixed rate mortgage our costs haven’t gone up in several years and so neither has the rent.

Same people will be looking for a govt bailout when the real estate market collapses.

Rent-seeking is an evergreen relevant Wikipedia article

ITT: People that have no understanding of nuance, or parasitism versus symbiosis. Some people actually find ownership to be bothersome, some people prefer leasing cars instead of buying, some people have good landlords, some other have shitty landlords. But let the hyperbolic nonsense fly and let's nuke everyone and everything!

Where are you Mario?

The appropriate criticism here is about corrupt markets resulting from restricted/scarce housing supply. Fair markets that encourage abundant housing supply, are ones that would lead to "perfect competition" and fair ROI on capital. The oligarchist/capital supremacy model of US/west corrupts markets against abundance, because extortionist profits fund politicians to protect extortionist profits.

UBI, not democracy, is the important freedom that can address structural corruption, but still the option to rent still needs to pay for the capital/expense investment in allowing you to rent.