I will grant you that the ideas are complex. But if words are not a sufficient medium, then we can't think clearly about the ideas.

Original philosophers have the right to define their own terms. If they can't define them clearly, then they probably aren't thinking clearly enough about their ideas to be able to talk to the rest of us about them. (Unless they consider it more important to sound impressive and hard to understand. But if that's the case, we can say "wow, you sound impressive" and then ignore them.)

I think this accurately channels Paul Graham's attempt to divide the world into "science/tech" and "illegible". But it's a little ridiculous to also divide the world into, "things I understand" and "things I don't", and state that anyone who speaks of the latter should not be permitted to talk to "the rest of us" until they figure out how to move themselves into your "things I understand" category.

The top scientists in AI can't explain how their models make certain decisions (at least not deterministically). Computer code is notoriously gibberish to outsiders. 90% of programmers probably couldn't explain what their job is to people outside of the field. If they can't explain it clearly, should they also be forbidden from speaking publicly until they can?

Is it possible that you lack the background to understand philosophy, and thus philosophers should rightly ignore your demands to dumb down their own field? Why should philosophers even appeal to people like you, when you seem so uninterested in even learning the basics of their field?

No, I don't regard all of philosophy (or all of non-science) as "illegible".

Nor do I regard the line as being "things I understand". I'm not (usually) that arrogant. But if, say, even other computer programmers can't tell for sure what you're saying, the problem is probably you.