Interesting discussion. Perhaps bouldering fits the modern media and climbing world better than sport at this moment in time. Here are a few possible reasons:
1 - You can go by yourself or with a few friends, bring a few pads, and try your proj as much as you want. No belayer needed and you don't have to fly to Spain, Greece, Norway etc.
2 - You can typically get pretty good footage of bouldering sends from bystanders and even a phone on a tripod, whereas longer routes require dangling dedicated photographers in order to get anything better than butt shots. As such, media attention and Insta posts will naturally favor bouldering over sport.
3 - At this point in time there might just be more boulderers than route climbers. The skills required to gain entry to high end bouldering are simpler as is the gear - no ropes, harnesses, belay techniques, anchor cleaning, boinking, lowering, quickdraw cleaning required in bouldering. Just bring a few crashpads and have at it, maybe a static rope to suss moves on high ball routes.
4 - As has already been mentioned, it's much less work to clean and prep a boulder problem than a long route. On a related front, the opportunities for new, longer lines on cliffs gets smaller and smaller every year, so you end up with linkups of different sorts, which to me are really not that interesting. Completely new bouldering lines are much more likely to be found.
I'm sure there are other reasons out there.
I, for one, am happy to look at bouldering vids because the movement is generally more interesting and creative than routes, unless you're talking about Adam Ondra.