I don’t understand this view. A person buys a house and wants to rent it out. Are they supposed to take a loss on the property just to make a cheap home for someone who is renting?

Oh wow, a landlord who doesn’t understand the concept of breaking even, i.e. not profiting off those poorer than you. What a surprise!

If you’re renting out your own personal home while you rent a different home there’s no real issue, but if you’re buying an investment property, renting it out at a profit, and not keeping it as nice as you keep your own home, then you’re just being a rent seeking leach that’s providing no value to society. You’re just enriching yourself on the backs of people poorer than you. It’s literally the same thing as Nestle buying up drinking water rights and then selling the people back their bottled water at a profit.