Languages change in various ways.  
I have not read about studies that measure the use of inclusive language in US English, so I cannot comment on your observations about the "general population".  
Perhaps the use of inclusive language is not common among your circle; it is certainly the norm among those with whom I interact on a normal basis.  Among younger people (those under 40) with whom I have had contact, it's truly unusual to hear "men" used in reference to both men and women.