If your parents talked with you about their field of expertise, then, as the child of linguists, it would seem that you would appreciate the fact that language does not stop developing, as long as there are people who speak the given language. 
For the past 40 years, it the US, there has been much conversation about inclusive language, and inclusive language is now considered the norm by many in the US.   (And, by the way, the term refers to an actual phenomenon, so there is no need to put it in quotes.)   To say that "Jesus died for all men" is simply inaccurate; our belief is that Jesus died for all people.  
I fail to understand the opposition among some to the evolution of American English.  In the US, it is becoming (and in certain cases has become) generally accepted that "man" refers to male humans, and that "people", or "humanity", or "human beings", or "men and women" are terms that refer to both male and female human beings.