“We don’t see such artificial divisions among Sephardim. Why not?”
Are you kidding? This is coming from someone who seems to go to an Open Orthodox shul.
Obviously the people responsible for the initial schisms were over an issur (eg. the founder of Reform Judaism). You question is if the Ashkenazim who didn’t break away from Orthodoxy are also over an issur just to having the audacity to exist?
I really hope you’re a troll so that nobody this mentally disturbed exists in the real world.