Cmon now...now you're just being obtuse to try to defend a position. Nobody pays for homes, cars, start up businesses with cash on hand.
A home, OK. A business, maybe. A car? If you have a decent paying job and can't come up with $10K cash to buy a car, you got problems. You're not doing something right. I bought all my cars and my motorcycle cash. I'm gonna continue to buy my cars and bikes cash. I can't even remember the last time I made a purchase I had to finance, and if I did put it on a card I did it for points + paid it back.
And again, if you play the game right, interest shouldn't even be an issue. You should be paying your house off early and avoiding the interest. You should be buying a house you can really afford (<3x your salary). You should be shopping for good rates and knowing what kind of mortgage you are signing up for. Is the discriminatory aspect of it fukked up? Sure, but its not the difference between affordability and unaffordability