The car thing makes logical sense at least, the idea that another expense would be removed as a result of dense housing, but that extra money would be spread across everything those people might want to pay for and not have much effect on housing demand. The rest of the things mentioned seem like variables that are independent of housing supply, and wouldn’t affect whether increasing housing supply suppresses price (it does) (that’s the whole reason to do it in the first place) (supply and demand is real).