In the meantime, let’s say that everyone has their own bird and should be satisfied with that! :-)
Then, I may be wordy, but for the sake of "brevity," I’ll cite just a few references to serve as mere examples, the tip of the iceberg, so to speak. The discussion between high and low culture is not one I initiated, but it's a differentiation born to classify—essentially a convention. In reality, there is no high or low culture, but culture as such; if we want to fall into this game and consider (just as an example) high lyricism and pop as low, then we contradict ourselves if we think (again, just to illustrate!) of Pavarotti, who loved to sing alongside Jovanotti.
As for McLaren, I know the story well... you know my books ;-) but he could never have done what he did without the right social humus to welcome that ferment. Make a parallel with Warhol, who could never have created the Factory and gained the fame he enjoyed if at the same time pop art hadn’t been invited to the Biennale of '68, which was one of the most contested biennales, complete with barricades in the Gardens by the students, the very ones we might call the proponents of the "low." As you see, it's the same coin showing its faces. Regarding punk, well, the Ramones predate the Sex Pistols, and others come before and after, and Malcolm McLaren represents only an episode in history, perhaps the most marketing-driven. As always, all eras do not arise from a single episode but from a concatenation of events. It's like saying that communism only died in November '89 with the fall of the Berlin Wall—no, that's just a significant episode taken as a symbol!
@GEB, I don't understand what you mean by postmodern; I don’t find the connection to your discourse. I do not diminish the dignity of any musician; I just say that, in my opinion, the first ones you mention left much less of a mark in terms of innovation and originality compared to the second ones. And the fact that Pink Floyd had 80,000 spectators, of which I was one at their concerts, and the Fuzztones had 500, with me among them, has nothing to do with it! Van Gogh sold only one painting during his lifetime while Picasso lived among billions, yet both were great artists. Orfeo Tamburi had equal dignity as an artist, but maybe only a few recall him; still, he lived off his art. In the sense that dignity exists for everyone; then, there are those who will leave a more significant mark through originality and content, and these are not always linked to commercial success.
One last note: I've been on DeB since 2003, when most still knew each other personally.