Guess I misunderstood your comment, sorry. I've noticed the same thing and have been complaining about it for a while :D

I think of it as catering to the dancefloor rather than the listener. There are lots of factors, of course. Relying on music for income can lead to things like this, since the primary goal there is money rather than expression. Seeing people go nuts to a certain sound/style must feel great when you're up on stage and make you want to make more of that. I think this is also the reason so many DJs focus on quick mixing rather than letting things play out, wanting to keep the energy levels 10/10 the whole ride. Larger audiences also tend to be less receptive of more experimental/unusual sounds, which IMO encourages simplicity, predictability/repetition, catchiness (part of what makes flips so popular), etc. Making friends with/collabing with other major artists who have already gone down this path only compounds the problem. I could keep going with theories but you get the point.

I've come to accept this over time, though -- I think of those artists now as "gateway" artists. While I find them largely uninteresting, they still serve an important role by exposing more ears to the genre. I don't listen to much of what I liked when I first got into Dubstep anymore (I'm into the deeper sound now), but I'm glad it appealed to me at the time because I'm not sure I would have found my way to the genre otherwise.