Thompson and Ritchie also said their secretaries happily wrote troff.
Do people get pampered too much today or are we severely underestimating them?
Also, there was a major difference between what the secretaries would have been using before troff and their experience with troff. In particular, at that time, they were probably using typewriters. A digital workflow would have been a massive improvement in experience. Need multiple copies? No more carbon copies or retyping, now it just comes off the printer (which may still use a carbon copy, but at least you don't have to retype it). Need to adjust something? At least for future printouts it's just changing the file, and maybe using whiteout and handwriting the correction in a few printouts. Want to reflow the entire page? On a typewriter you start over, with troff you edit.
Today, people have Word and Google Docs, why do they need troff/Markdown/TeX/LaTeX/Asciidoc/org-mode/etc.?
The experience, for the user, is not as qualitatively different as those secretaries would have experienced at the time. Not just secretaries, my parents (a pilot and an engineer) took to computers in the 1970s (in college)/1980s (work, later home) for the same reason, it was a better experience than using typewriters and hand calculating things (even with a calculator).
Because what they write has structure and they don't want to be distracted by the looks.
Regarding your "don't want to be distracted", Word has had an outline mode since at least 1995 (first time I used Word). Not sure about Google Docs, but it's a perfectly fine distraction free writing environment. So that's not even a selling point for users of Word.
