My point here is that US academia does have an influence on the real world. I don't live in the US so its hard for me to comment, but I'm just stating what i understand to be a fact that terms such as African-American, Native-American, Challenged instead of disabled, impaired, person instead of man (chairperson for example), staffed instead of manned, differently-so and so, and so on, originated from US universities. I'm sure there are many others. According to wikipedia one of the first recorded uses of the term CIS was by a student from the University of Minnesota.
Again, whether all the intersectional privilege theory and so on will have an impact beyond the ivory towers in the future I've no idea. Ive no idea how truly prevalent it is now, or what its like in a US university. I'm just making the point that it is possible for these kinds of things to have an impact in the real world, and that the fact this stuff is happening there doesn't mean it can be dismissed as irrelevant and ineffectual just because it happening there.
As a complete aside, the biggest contemporary example of a US university having an impact on global culture has to go to the Chicago school for its economics department. The fuckers