Yes I am in control... just kidding... well, in reality, I kind of am...
The media conglomerates number few at the top and are a consortium of multinational corporations whose subsidiaries, the record companies, are continually pushed to trim the fat off their artist roster whilst remaining profitable even in these tough times. Thus, the best bet for many major labels is to invest in their current talent rosters of superstars like Beyonce, and also develop new cookie-cutter bands albeit hip-hop, rock, etc., in order to give the consumer music that is created with money invested at a lower risk than trying to break something "completely new" and not being able to break even on the investment.
It is a business, and profit is a necessity, the lowest probability of losing on an investment is dealing with superstars proven to sell, or developing bands that sound like what is mainstream right now. Also, there are studies and tests done on study groups in order to assess what the people would like, and many people tested from these demographic studies like the garbage you hear on the radio and on MTV.
Also, there are different psychological profiles that media companies cater to, and these profiles are usually angry males, or hypersexualized female images, both of these are evident on MTV and also other teen to preteen media outlets. It's quite sickening, but it is the game.
Also, there is a new push to cater to baby boomer generations (like your parents) to repurchase their favourite music, that is a big market as well.
All in all, the consumer thinks that they really have power, which they do, but are moulded by the images they are bombarded with since childhood, and these images make you align with various social groups, all of whom are studied by record companies, and try to predict the next trend.
So, that's who's in control. Don't be naive about it. But you do have a choice by purchasing or not purchasing. How you were normalised to make that choice is specific to what you were presented during your formative years.
Sincerely,
God