The only issue I have is with the types that rent part of their house at a price that’s well above their mortgage payments. I hate that everyone just shrugs and says “the market has spoken! Some website said I could get 2k for a studio basement apartment so that’s the price!”
I can’t say I like people buying multiple houses and then renting them so there is less for everyone who wants to buy, but I can be somewhat sympathetic to the idea that there really are people who just want to rent a house for a handful of years and then move on so in that case it really is a service.
My last landlord charged 1200 for a basement… His mortgage was less than $900… Yeah yeah taxes and whatnot, but the point remains that I should not be paying all of your expenses for the “luxury” of renting a basement…