How many people here have ever tried to create some music themselves? I sometimes sit at the piano and mess about, having never had a piano lesson - although for a few years I had lessons on other instruments.
I think that what emerges is a combination of what you like to listen to yourself (e.g. Vaughan Williams-esque chords), references to existing music that you accidentally produce ("That sounded a bit like Bohemian Rhapsody"), and what the layout of the notes on the keyboard produces itself - there's a hell of a lot of music out there based on an 'epic' chord progression that is produced automatically if you repeat a sequence with your fingers up and down the keyboard...
The emergence of real music from the basic random noise is sheer magic and takes actual effort to capture in order to re-use it later, but I think that a lot of modern pop music doesn't actually bother with this aspect.
It has rhythm - because anyone can create rhythm. Some of it has complexity, but it is arbitrary complexity - because anyone can produce arbitrary complexity. It is basically tuneless, because creating tunes is orders of magnitude harder to do than all the other peripheral stuff that goes into creating a piece of recorded 'music'. It is empty, has no core.
One thing I hate is 'polyfilla chords' (my term) that are just there to fill a space - not musical, not relevant to the tune such as it is, but just a collection of notes from which the listener is expected to infer their own tune. If you strum the strings of a guitar pressing a random fret or two you will most likely get such a chord: not 'discordant' as such, but not not musical either. You can 'passionately' strum such chords, striking rock star or sensitive artist poses as you do it, creating a sequence of polyfilla that fills up the required three or four minutes on which the producer can go to work. But it is just a pose, with no 'heavy lifting' of real tunes out of the arbitrary random background; it is just arbitrary random background placed in a frame.
I think the reason that people bother with it - creating it and listening to it - is that the rock/pop phenomenon was so huge in the 60s/70s/80s that the echoes are still with us; a fascination remains and people are still going through the motions, unfortunately without the excitement, novelty or good taste. Its evanescence is obvious: no one can remember last year's biggest hits or 'artists', and music from 50 years ago outsells today's.