No. Most people would advising avoiding an office manager for awhile. The idea is that the company should only be doing important things and important things are worth doing by the key people.
Office managers typically help with a mix of accounting, HR, coordination, and dozens of other operational tasks. In many cases doing a better job than key people who were overloaded with them before.
While I suspect that Suster is making an exaggerated conclusion to drive page views, it doesn't sound that off the mark to me. After raising an A round, you're going to want your key people spending as much time as possible on scaling the core business. An office manager is a great way to help them do that.
This is a very broad conclusion about what is typical. From where are you drawing this statement?
Also, why shouldn't the office manager be put in charge of important things? They're a paid employee with specific skills.
If the office/ops mgr can work on customer or product development, that's a different story.
I got bitten by this pretty badly. But perhaps bureaucratic load in Europe is much harder than in the US. And for me, it was never a question of need — the need for designated operations/administration employee was obvious from day 1 after incorporation, I just thought I can't afford it.
Well, I was wrong. I couldn't afford not having such a person. Some people say the same about lawyers.