You’re saying nonsense. You expect the parents in meah sheorim to have a picture of book entitled “types of jews”, where they will point out each one and say “this is a teimani, this is a bucharian, this is a chardal, this is a dati, this is someone from the five towns, this is someone from chicago.”
MO kids don’t grow up in insular neighborhoods, because such neighborhoods don’t exist. If they did, then I expect they would be very surprised the first time they saw a chossid, who would look nothing like the jews where they were from.