For the record, many of the microwaves I've used have required something more like "Time cook -> 2 -> 2 -> 2 -> 3 -> 0 -> 0 -> 0 -> Start -> Facepalm" than the intended "Time cook -> 2 -> 3 -> 0 -> Start".
TL;DR: pressing buttons is easy, but sometimes they press your buttons back.
Ahh memories. Back in college I had a microwave where almost all of the buttons stopped working over time. Eventually I had to set everything for something like 4:44 or 44:44 and use the timer on my phone to know when to take it out.
My previous one had something like, e.g. "Cook > Power > 500W > Time > 15 sec > 15 sec > 15 sec > Start" for cooking something for 45 seconds at 500W. None of my guests knew how to use it, because pressing buttons in wrong order would do nothing (not even error "beep").
TL;DR: pressing buttons is easy, but sometimes they press your buttons back.