This seems like a “prisoner’s dilemma” situation. It’s rational for an individual landlord to evict a delinquent tenant and seek a new one. However, if everyone does this the entire market collapses. It’s better for everyone if the landlord takes a short term haircut to preserve the market.
Since cooperation is expected to break down between individuals, the government must step in to prevent collapse.
Capital owners are not a special class of citizen. If you have assets and need cash, there is a way to convert one to the other. It's called a "market". You may have heard of it.
It seems that during recessions, asset-rich/cash-poor people, nominally Capitalists, turn into overnight socialists because making cuts to the ol' lifestyle is for the little people, not them.