That fact doesn’t make it a fallacy. The fallacy part is the idea that the people choosing to automate that job are just stupid and ignorant, and don’t understand what the job really is. Which I’m sure is true for some automation, but doormen are a terrible example.
It’s not an absolute. The fallacy doesn’t imply that every building would be better with a doorman. But it does suggest that buildings that DO have them aren’t necessarily making a wise choice by getting rid of them.
At this point, though, I mean if you don’t get it, you don’t get it.