It's not silly to blame music and cartoons as part of the problem. Children mimic what they look up to, even through their teens. The dumbing down of language in the mainstream music culture, particularly in rap music has a major effect on how the young communicate and it's absurd not to recognize it.

What you say applies too, but as someone who until recently has taught English to different age groups over the years and have been around middle schoolers and high schoolers every single day for hours on end, I know for a fact that the cartoons and music they spend their time on helps shape their speech, writing, sense of humor, etc.

If we are talking rap, there are many greats but that's not what's being pushed by the industry. Hell even in the 90s Tupac was a fucking poet compared to the dredge out there.

Hell you have artists like Dax who are great lyricists to the point where you can hear a song multiple times and keep catching new word play.

https://youtu.be/5fuTlPlt74E

And that's just for word play and lyricism, but he has many songs with awesome stories and messages.