For how impactful runes are and how hard it is to change them, it's crazy that we only get 2 pages

I mean they literally determine your playstyle throughout the entire game and you have to play around having a given set of runes. By limiting the number of rune pages people can have, Riot is just making it so that we are stuck into two certain roles because of how long it would take to reset and rewrite the runes (especially if you only play normals.)