I don't think anyone has said that he was more influential. That's a silly, go-around-in-circles-pissing-on-each-other argument that I'm not at all interested in having. The influence of both Miles and The Beatles are difficult to quantify and no doubt unimaginably large.
That said, speaking from the perspective of myself, a professional musician has my roots planted deep in a dozen musical traditions, jazz and pop included among them, the shadows of both Miles and The Beatles loom equally large in my mind, in multiple directions and often overlapping.
> Miles changed jazz multiple times but from fusion onward jazz becomes mostly an irrelevant genre like rock-and-roll sadly is today.
This is just...wrong, sorry, and you're really doing yourself a disservice by ignoring such an absolutely massive amount of great music being made. We live in one of the most vibrant times for jazz since the 50s. Tigran Hamasyan, Mark Giuliana, Julian Lage, Wayne Krantz, Christian Scott aTunde Adjuah, Joshua Redman, Kamasi Washington (and his LA jazz scene pals like Thundercat). Legends like Herbie and John Scofield are still around. Jack DeJohnette is doing massively vibrant stuff. Pat Metheny still sells out arenas. Jacob Collier is massively well-known and is this generation's de facto jazz educator, like a little elfen Bob Ross of jazz.
The list goes on and on and on. As a jazz fan and musician myself I can't think of a better time to be alive than right now. Saying jazz is irrelevant is like saying comic books are irrelevant while ignoring the existence of the MCU -- sure, maybe not everyone is reading comic books anymore, but look at what it's become!
Ditto for rock but I'm not even gonna go there, it's even more broad.
These genres evolve, yes, but just because Miles isn't up there in a suit like it's 1958 doesn't mean that jazz is irrelevant.
You're also ignoring the influence of his (reading between the lines, music you dislike) later work. Without his post-fusion stuff, hip hop as we know it would not exist. Quincy Jones' entire career would not exist. Just...stacks and stacks of records would not have even been given their initial drop of lifeblood. Immeasurable. And that's from his "worst" era.
Just because The Beatles changed everything (and, no doubt, they did; I'll happily wax poetic about them just as much as I will about Miles), doesn't mean that others didn't have an equally large impact. I feel pretty confident saying your inability to see that has less to do with objective reality and more to do with your perspective of it.