Where is that happening? And are you sure we're not actually talking about people who misunderstand the purpose and legal requirements of diversity training programs?
As far as I can tell, this is the first comment in the thread to suggest we're talking about widespread mandatory "social justice" meetings that are political in nature and unrelated to the workplace's legal obligations. That's not what I got from @daok's comment or anything in between, and there are widespread mandatory diversity training programs in the U.S. that explain all the comments above, from my perspective.
I've never seen that (mandatory meetings unrelated to work) myself, across employment at 2 multinational corporations, several mid-sized companies, and a handful of startups. The mandatory diversity training programs in most companies are there to meet the legal obligations of discrimination law, whether they tell you that or not. Usually they tell you that.