Perhaps a version of the Doorman Fallacy, ie. replacing a doorman with an automatic door seems like an obvious win, but it turns out the doorman was performing a number of other vital functions (customer experience, for example) which weren't considered.
Perhaps another version is bullshit jobs, where the doorman really doesn’t want to be there, and the other tasks such as greeting people or providing some sense of security really wasn’t his raison d'être
On the other hand it also highlights the unrecognised, and unremunerated, efforts of the doorman.
In an ideal world (yeah, I know), it should result in them being paid for what they actually do.