You hold tight to this view and have repeated it here and elsewhere tons of times...but I don't agree with it all, particularly, although parts I do.
It was, partially, the fact that Jazz stopped being accessible/understandable to its previous audience which also made folks (listeners) slip away from it. To lay it all at the feet of rock and roll isn't accurate. It's a multi-faceted occurrence, but to not acknowledge that be-bop replaced certain qualities and aspects of the music which had been relatively easily consumable for a listening and DANCING audience, with something far, far less so...would be ignoring a pretty obvious reality.
Mind you, flip side is - what would jazz BE today had that not happened, artistically/creatively speaking ? Hard to imagine it without the leaps and bounds made from the late 40's thru 60's and even thru 70's-80's with advent of fusion. But that's another subject.
So I agree, did bop "kill" jazz ? No, hardly. But did it have a significant role in 'killing' it as a popular, consumable musical genre ? Yes....
But you see, the thing is, bebop did NOT displace swing for the vast majority of young American music consumers and dancers. What displaced swing as pop music was singer-pop and rock and roll. Bebop was always a side issue, a niche thing. Most swing musicians kept on playing exactly what they had, and fewer and fewer people wanted to pay for it. In the period, let's say 1950-1955, there were still thousands of territory bands playing swing style stuff for dancers all over the country. But the people who came out to hear and dance, were the same people who'd been doing it in 1938. In other words, the parents and older cousins of the teenagers of 1950-55. Those teenagers, they might have been vaguely aware of this new kind of "modern jazz" that was being followed by maybe a couple hundred, mostly Black, musicians in New York and Chicago; but they wanted music that was (at least a bit) transgressive, new, they could do THEIR dances to it, not their parents' dances, the kind of thing that speaks to teenage hormones.
It wasn't like cadres of bebop enforcers came into every gig where the Mal Fitch or Jack Melick or Durwood Cline Orchestra was playing and forced them at gunpoint to fire the girl singers, up the tempos, start playing flatted fifths, and so on. Nope, those guys were putting out the same product as always, but it was losing market, and the customers were aging (and buying houses in the suburbs and getting 9 to 5 jobs and college degrees on the GI bill and making babies).
Of course, the earliest rock and rollers, mostly Black, were also mostly experienced Swing musicians, who saw that young people weren't paying to hear syrupy ballads or to Lindy Hop. I mean, you take Louis Jordan or Big Jay McNeely and tell me exactly what makes those guys "early rock and roll" or "jump music" while Cab Calloway is "jazz" or "swing". It's an awful fine line. So I'd say that in many ways, jazz split into two paths - bebop, a niche product for a few people, and jump/R&B/rock and roll, which was for the masses. The first rock and roll musicians were playing something that wasn't that far from the wildest simplified swing. Then you had the influence of country music and yet another of the many periodic injections of the blues (this time more of the electric Chicago style) and you get "classic rock and roll" - Little Richard, Elvis, Buddy Holly, etc. Really, you could make a pretty good case that all of that early rock and roll is just another style of jazz, like the difference between New Orleans, Austin High, swing, Big Band swing, bebop - well, rock and roll at that point in history was really just another branch on that tree.
Anyone remember - I think it was Lightnin' Hopkins - had a song "Twist ain't nothin' but the shimmy like Grandma did"?