While I generally don't have a problem with the limit of only 3 sets of parents, the times when 4 or more sets of parents were something I was interested in adding or needed always make me wonder why there's a limit.
Like, I get why having a certain amount at the start would be a problem.
My question (and I guess feature-request) is why isn't there an "add more parents" button for those that aren't satisfied with only 3 sets of parents?