Never underestimate the power of a great deal of very stupid people. The sad thing is that a lot of people don’t like it that others are smarter/more experienced and more competent than them. As a general rule, they tend to be Republicans. That’s why you see Republican politicians with an Ivy League education pretending to be morons that are “salt of the Earth”. They know full well their base is filled with morons seething over the notion that other people are smarter than they are, have more education, etc…

So the fact that Ronald McDonald is most likely an actual total moron who knows next to nothing is considered “authentic” to the base.