I read an article claiming that repetition causes popularity, not the other way round. Can't for the life of me find the link, maybe someone knows what I mean.
I think it's the typical "average stuff for the average person", people generally don't care that much about what music is playing, as long as it's within the range of "average" and it's catchy enough. Basically open up the player, play the first thing that looks good enough and then leave it there.
Then it's called "mainstream" music for a reason, most people are OK with listening to it in the first place :)
I think there’s bewilderment is mostly from these not being “mainstream” people.
They're politicians, CEOs and "celebrities" (in one way or another), it doesn't get more mainstream than that, does it?