Oh yea, n' Serb, I understand your point, the problem is that who's to say what's explained and what's not? You could say "Vote - Trus, I thought his closer won it". Is that an explained vote? Some people would likely say yes, some would say no, and then there would be fights about which votes get dqed and which don't.

This way, it's very simple what a valid vote is and there's no room for arguing.