So? Flip yourself then. Buy a 2 family unit, renovate it while you live in one of the units, and then flip when you're done. Repeat a second time. Now you're set. All of this is folded into your mortgage. If you're not a capitalist, you're not going to have a good time since no one is going to break your doors down to save you.
And where do you suggest an average person gets the money to do this? A lot of people cannot even afford to buy a home for themselves, let alone a 2 family unit.