But, you need to subtract your pay from the value you create. If you create $1MM value but cost $500K, and someone in the Midwest can create that same $1MM value for only $150K, it's pretty obvious what most companies will choose.
FAANG companies somehow convinced themselves that paying $500K for talent in SV made sense even if they could get similar talent basically anywhere else in the US for less. This massive WFH experiment that we've all been in seems to have demonstrated to some of them that physical location doesn't really matter as much as they thought. The next logical step is that paying inflated rates to hire someone in a particular physical location doesn't make sense, if you're just going to have them work remote anyway.
WFH may just be the pin that burst the SV tech wage bubble.