Companies do not as a general rule value tech writers. They seldom hire them.

Tech writers get paid less than other profiles, so why would you do it if they company did hire them.

PMs do not set time aside for programmers to do tech writing, nor do they set time aside for them to talk to tech writers if tech writers are hired. Thus programmers are taught to blow off tech writers in favor of making their ticket move through the scrum board quicker. n