"Lowest Common Denominator Syndrome" eh?
It has ruled society (particularly education) for decades. It's the foundation of progressive belief in "inclusion" and "equality". If every single person cannot understand something? Dumb it down until the mouth-breather in class or at work "gets it" too. By then it's garbage, but those at the top will give themselves a raise as they further undermine schools / their own companies.
It's what DEI was all about too, when stripped of the racial veneer.

For the record: conservatives DO believe in inclusion and equality too! Everyone should have a right to 'try out for the team'. (Not a guaranteed spot on it though.) Everyone should be given equal opportunity to succeed. (But not guaranteed equal (read: identical) success) & etc.