Writing for Radio Versus Writing for the Page

i'm a big rap fan. And there is this canard, this argument that is often made that i think is false, which is the rap is etry argument. Right now, writing rap lyrics and writing poetry have things in common. Sure, they're both expressions of the english language that are often non literal and highly motive. But when i hear rapis poetry, what i hear is that in order for it to be serious, in order for It to be worth considering,  it has to be a version of this other form,. When in fact, it is its own form, right? Ino another form which is highly coded as educated, a worldly and predominantly historically