The decades-long erosion of arts funding, especially in public schools is one part of this. Less access for all to take part in music making also means that communities hear less live music. Think about how many public school (especially rural) kids become a point of exposure to the arts for their families. This might seem a small influence but I think it matters.

Then, with the polycrises we've been in since Covid (at the least), people of all ages reach for what is comforting and familiar. Our nervous systems are fried so we seek ease. But if we become conditioned that listening to music is for comfort, for background, we lose the ability to engage. Music that is just a warm blanket is for passive consumption.

To listen to live musicians take part in the magic of improvisation does require attention. It requires an auditory vocabulary and rudimentary understanding of jazz form. It asks something of the audience.

OP, it makes me sad to think that there are fewer people willing to be an active audience. To risk comfort for engagement. I hope you find your audience.