A possible addition to your list: maybe scientists don’t know their texts are impenetrable. I know I often skip important but “obvious” steps without noticing when explaining stuff. Lectures get repeated and can plausibly evolve to be understandable, while texts stay set in stone.
There are many texts origining from lectures and they are generally no more penetrable than texts written from scratch.
I am a bit skeptical about evolution of understandability. It seems to me that lecturers able to take a feedback and improve the structure of their explanations are rather rare.
A possible addition to your list: maybe scientists don’t know their texts are impenetrable. I know I often skip important but “obvious” steps without noticing when explaining stuff. Lectures get repeated and can plausibly evolve to be understandable, while texts stay set in stone.
There are many texts origining from lectures and they are generally no more penetrable than texts written from scratch.
I am a bit skeptical about evolution of understandability. It seems to me that lecturers able to take a feedback and improve the structure of their explanations are rather rare.