This is exactly it. My advisor wanted a word doc to edit, not a PDF. I wasn’t quite snooty enough to think that he should learn latex. Though, if he ever took the time to learn (what time?), I’m sure the writing process would be unbearable for other reasons not entirely related.
It also can help with dental hygiene if your brushing habits are not symmetrical. I get tartar buildup on one side of my teeth if I don’t switch hands.