Everything, including physical reality, is socially constructed.

This is like solipsism, but with entities multiplied.

I mean, it's probably true that what we call material reality exists for us only when we perceive it--the Schroedinger's cat/quantum (electron?) paradox--one is everywhere and nowhere simultaneously.

OK for stoned contemplation, but not a rational basis for social relations. No wonder so many people think you can just choose a sex regardless of your gonads.