Even then you normal would not sue the company providing the radio broadcasting equipment. Just the production making that particular radio content. Some times they were the same, but they could be different entities.

Section 230 also protects those providing infrastructure for the internet as they do not have common carrier status. Also where do you draw the line between hosting and not? I can use twitter and many other sites to host images. Alot these sites grew out of an easier to use means to host content.

Like what about sites like word-press and medium that also provide easy to use platforms for blogging. Should only the technically inclined be allowed to get hosting?

Yeah, the suits usually follow the money or oversight, like the host, producer and or station owners.