I assure you tax treatment/subsidies are not what make my business possible. The retail prices (comps) for the neighborhood the product exists in, drives profits. Yes a house is just a product (other than my own home)
You have to live in a house for two years before you can avoid capital gains tax. Otherwise, as an Investor, I am paying capital gains unless I do a 1031 exchange (meaning I am just delaying the inevitable)