Firstly, I'm not saying I disagree with any of that. But do you concur that someone lending money, or renting a house, is entitled to some margin of profit for the effort?
Yes, but the mis-aligned incentive is that these are "risk-free." Profit should be correlated to risk taken. Predatory lending practices cross a line.
. People pay market prices for rent or they would not rent out my spaces so win win. When I try to ask for a rent too much above market for the next tennants, they simply reject and counter and we settle at a market price.