This has been going on for a while. In a TV or radio commercial, the woman is
always the one with the solution to the problem, or the one who recommends the company's product to fix things, or is somehow in a positive light.
This is not to say that whenever a man is present he's depicted as a doofus; it's that whenever a doofus is depictd, it's a white man.
Yes, it has, and you're exactly right.
My wife claimed I was making this up until she actually started paying attention.