Well, supposedly when they depress, it becomes problematic.
Yeah I'd see it being a problem if keys were actuated and kept that way.
It's just a good way to help ensure keycaps don't get loose when dealing with 2-piece keys.
Consider that the type of situation in shipping where keycaps on 2 piece keys may be knocked free is also the type of situation which might break open an end of the box (meaning out go the peanuts AND the keycaps)
Doesn't apply to a Model F of course.