There's a lot to unpack in that post. And, while I never had a personal assistant, I did depend on secretaries to type up memos early in my career. One or two were good; others struggled to get something mostly correct through multiple iterations.

And even a bit later--in the computer biz--there were some senior managers who had their secretaries/admins print out their emails. They'd handwrite responses, and have the secretaries/admins type them in and email them. (Though the email was only internal to the company at that point.)

I don't disagree with or even lament the sentiment that a lot of secretarial work has basically been smeared across a large number of workers. While a personal assistant can be useful for some people with very busy lives, I honestly never found a shared assistant/secretary terribly useful especially as computer-based tools came into the picture and got better.