Landlords make a profit so they are apparently throwing less money out the window than the renters.
That's a particularly pointless bit of misinformation. Holding property isn't free, in general. Land is quite the liability in California unless you make enough to justify holding it. Landlords make plenty of money. Currently 750/mo (or more) for single rooms out of a house in southern california for anything decent. With AirBnB you do much better. The math is straightforward.
There is nothing that says rent has to cost more than owning.