I think it was aimed at adults who grew up on Howdy Doody and Mr. Rogers.

https://www.cbsnews.com/news/sesame-street-for-adults-only/

First season of Sesame Street got rated R. Back when Oscar was orange.

iCarly cuses in the reboot: https://comicbook.com/tv-shows/news/icarly-reboot-cursing-fa...

Sort of like Adult Swim it was meant for grown ups but the kids watch it too. Too young to get the jokes, the kids love it.