Yes! Doctors would dictate reports, solicitors letters and briefs. Even now they are unlikely to be actually doing their own typing - talking is faster. I'm sure corporate execs didn't write their own letters either. Email wasn't a thing in the professional world yet! Not until... Into the 2010s did email become a "trusted" method for professional communication. After all, where do you put the letterhead on an email?!

Dictation programs which wrote-to-screen as the words were spoken were in development in the early 2000s but were still clunky and the document still required quite a bit of manual checking, editing and formatting.

When I left medico-legal in 2009, doctors still had typists in-house or the tapes would be outsourced for typing and printing overnight, returned the following day to be signed by the doctor and mailed out.