You're definitely not the only one, but I think it's staying around because of a real societal need. The civil rights era was a recognition that background wasn't a valid basis on which to stereotype strangers. In the intervening decades, we mostly stereotyped strangers based on how they presented themselves, with a few recognisable 'types' of people that had little variation within their clades.
Then the internet happened and society fractured along personal interest, whatever one is into now there are dozens of people with the same interest online. It became impossible to distinguish people on the basis of fashion either.
But to interact with strangers, we need some way to stereotype them, and so intersectionalism has tried to fill that gap. It won't work in its current form because nobody who presumes to declare on behalf of an identity group as to what is a proper way to treat members of that identity group is actually representative of any group. But the need to stereotype strangers somehow remains, so social offerings like this will continue to be brought forward.