"Won't somebody think of the children" is constantly used sarcastically in order to dismiss the concerns of people who want to ban something they claim is harmful to children. This is often a completely justified rejoinder - many regulatory policies that thoughtless people argue for in the name of children's safety are counterproductive, disproportional, or otherwise harmful.
I understand your point and clearly see that LLMs cannot be compared to audio ... but ...
Back when I was a kid, music, audio and sound systems had high quality as a standard.
Nowadays people listen to music mostly with bluetooth headphones which basically recompress an already compressed audio signal to send them in low quality. Also, it is more and more difficult to find OK stereos that play music in good quality. Either, you have to pay very high prices for overpriced "audiophile" equipment, or you are stuck with cheap chinese MP3 players.
Yet, society and markets have spoken. Sometimes society is happy to accept marginally worse products in exchange of price and convenience.
In the case of present-day LLMs, the vast majority of the public finds them to be more harmful than beneficial.
Why accept a decreasing quality of live instead of sensible regulation?