I would do a bit different approach:
Our company uses those at remote customer locations or temporary setups where fixed line is not possible to have. Such as construction sites or video surveillance or remote buildings. On that site one use scenario mentioned is those installed in city buses providing free WiFi for passengers.
I’d quess overkill is a proper way to describe one. More features than I can figure out uses for. Despite being robust and well featured, at least here the retail price doesn’t differ much from what I paid for my Asus AC68 home router few years ago.