The only part of your post that I would take particular issue with is:
This is complete shit...mostly because it's wholly subjective. In my opinion 99.9% of mainstream, radio-friendly music sucks. It is geared to appeal to the masses...the lowest common denominator.
Depends on the definition of "sucks"
Popular music is popular for a reason. People like it.
Do I consider Lady GaGa a musical genius? Nope. I hate the below mentioned Montana.
Maybe their music isn't the most technically proficient or whatever, but it resonates. People like it, people buy it. It sells advertising, it keeps people employed. Slippery Skillet and the Greasebags barely pays the rent.
Asparagus is good for you and some people like it. But there's not a McParagus on every corner. Because it sucks and only a handful of people will buy it.
It's basic economics. If you're independently wealthy and don't give a shit if your radio station loses money and your people starve to death, you can play all the Doobie McDooster shit you want. If you're in business to make money you've got to cater to as big a market as possible.
If he wants to listen to niche music then he can get a satellite radio. It survives there.