So the "pros" are always right and the fans are always wrong......
Amazingly, you still have that mindset.
It is not a question of "right" or "wrong", although you have often interpreted what the professionals have said that way.
It is a question of how stations in competitive markets have to program in order to get a large enough slice of the pie (listening audience) to attract agency advertising buys and get results for local advertisers as well. The stations you have consistently highlighted as examples that "it doesn't have to be that way" are all in smaller markets that either are unrated or the station has little or no competition in its chosen format, so they don't need to use the same methodologies -- including the word you dread the most, "research" -- that the large stations do. Which is just as well, because under those circumstances they could not afford to do music testing, etc.
Internet stations are similar to small market and unrated market stations. They can't afford research, but they also don't attract enough listeners individually to warrant it. As has been stated before, internet streams are operated by music enthusiasts like yourself for whom terrestrial radio no longer has an appeal. And that's perfectly fine by me, since I'd never be able to make you happy anyway and at least that stream gives you self-satisfaction. The number of people who listen to "pure" streams (not just a broadcast station online) are not enough, in total, to make any dent in the overall ratings. This is provable by the fact that there are very few streams that make it into the ratings book, and those that do are invariably simulcasts of HD-2 channels and counted along with their originating station.
Now, let me bring up WOGL before you do. They are an example of how research and music testing can result in a broader playlist, for one simple reason. Their listeners are unique to their market. If I dropped KRTH's playlist onto WOGL it would fail ... not because of the number of titles but because those aren't the songs Philadelphia's listeners would consider their favorites. That is also why WOGL's playlist would not work on KRTH.
There is one context in which I will use the word "right", and that is: Programmers know when they get it "right" when the numbers go up or remain within the margin of error. Even a downward trend can be "right" if all the other stations that share listeners are similarly trending. That's why we don't panic over minor shifts in the ratings.
I don't have a problem with you liking a broader spectrum of music than is programmed on the air today. I have an incredibly vast personal music library that includes songs that never charted in the U.S., album cuts, low-charting singles, and the hits. And they are from very diverse genres as well; it is not uncommon for my MP3 player to go from "Chattanooga Choo-Choo" by Glenn Miller to Jim Capaldi's version of "Love Hurts" followed by Gerry Rafferty and "Baker Street", wrapped up with "Dreadlock Holiday" by 10cc. However, your personal likes do not make you an expert on radio programming, and that is where I have to draw the line.
Simply repeating "the pros are wrong, the fans are right" does not make it so. We do this for a living. You do not.