[goobatrooba]

It feels a bit like you didn't apply the lesson of the article - these "doormen" have often different functions (theft prevention or at least reduction, information provision, support for those that need help, some minor cleaning or caretaking roles, and the greeting/visibility/we-are-a-fancy-place vibe ;-)

In countries where labour is cheap it is common to have staff for less essential things as humans are just more flexible (but also less reliable) than machines.

[strogonoff]

Personally I thought opening doors was about the only thing they did—never seen them engage in any other activity.

I am not sure you provide a counter-argument, IMO offering more people a way to earn money and do something useful (as opposed to delegating these duties to [generally foreign-made] equipment) as a way of maintaining a healthy society still holds.