"If we're going to be able to edit rune pages in champ select why do we need multiple?"

Maybe because some players would rather not have to make a page from scratch every game. I'd rather not have runes become a chore I have to do before every game, I'd like to have some "default" pages for aram that I don't need to touch because they work well enough. I'd rather not have to scramble to find certain runes during champ select.

I really don't care if YOU don't need more than 1. I do, and I'd really rather not lose that.