Serious decline of lyric intelligence in pop music

"Popular music lyrics are dumb. No really, I’m not just saying that. As easy as it is to mock the quality of lyrics today, there’s some real science behind looking at how dumb they truly are":
[www.seatsmart.com] http://www.seatsmart.com/blog/lyric-intelligence/

Here's the first expletive-laden example that came to my mind. Some people were suspecting a conspiracy theory where labels are deliberately promoting dumb songs to make black musicians look stupid:

[www.youtube.com] https://www.youtube.com/watch?v=2mwNbTL3pOs

I just like it for how absurd it is.