Yes, but usually not so far that the metal is showing. I learned from this video years ago. Having done tire changes with and without the luxury of a burnout. It is noticeably easier after the burnout.

edit: forgot to link the video. https://youtu.be/dAKIuSjPXxA?t=40

Maybe marginally. It’s pretty easy already to take an old tire off, especially on the machine.

Putting a new tire on is always the hard part imo. I usually let mine sit in the sun for an hour before mounting it.