Me, I’m saying if you ban the practice of buying houses to turn into rentals, you are reducing the number of rentals thus increasing the cost to rent.

You are right that nobody is talking about renters, but that is the problem. If you only focus on bringing house prices down, you settle on a solution that brings house prices down while increasing rent prices. You think you’re helping poor people buy houses but you’re actually helping upper middle class people buy while screwing the poor people who still have to rent.