When you are late, "Late is late"
When geniuses are late, "Are you serious? We are busy!"
I also had to wait 20 minutes more even when I arrived 15 minutes earlier.
Hang on a moment.
So a "genius" (lol that's such an embarrassing term) cannot be seen unless you make an appointment, you have to book a slot.
So if you book a slot, you must be given a average time window where they would see you.
So you are a few mins late. What does the genius do?
He can't see the next person he's booked for, as the next person won't be there yet.
Or does he randomly go and look for someone standing around who had not made an appointment?