Lol marx didn’t wrote about the workers because they were more virtuous than the bourgeoisie, he saw their potential for grinding the capitalist machinery to a halt

Marx did write nowhere "Only workers are able to create working movements!". However you are right that if you are talking about the real existing movement, though drawing from that theoretical tidbit the claim that was made and uplifted against being intersectional and that is based into "tricking people into acknowledging their false class conscious to see themselves as workers" is a stretch.