why is head to head tiebreaker only if 3 teams are involved? If I was tied with another team and I had beaten them in our only match up shouldn't that be considered as head to head record?
Like the NFL, when 3+ teams are tied and you're vying for that one spot, it's only fair to use that method if it can be applied to all the tied teams or else you can get penalized for having a tougher schedule or get through easier with an easier schedule. You're trying to break the entire tie, not small parts/sections.
The NFL also implements this behavior for the same reason.