Yeah, which could be really annoying for someone who has a challenge pressing two buttons fast enough to trigger.

A hotel I stayed at had touchscreen "requests" for elevators (you put in your floor and it would call a elevator for you) and it was super annoying (trying to get floor 12 would doublebounce on 1 and 2 so you'd often get 11 and 22 before getting 12) until I found a pedestal out of the way that had real buttons for all floors.

The "hold your keycard up against the thing" is also really annoying when it is 5 feet off the ground; imaging having to wait for an elevator until someone comes along who can hold your card up there for you.

This was the same setup in a condo tower I used to live in. Touchscreen grid of floor numbers and a keypad (with Braille) at ADA wheelchair height.