As stated simply counting any vote as a like would result in manipulation of the data by someone using hundreds of useless accounts.
How is this different than one account being followed by hundreds of "inactive" brain-dead (removing the B in PoB) accounts on hive.vote? They have a ton of artificial weight behind their votes skewing the numbers.
One person saw your post and 200 people didn't see it, but voted. How is that a useful metric?
RE: Introducing a "like" Button to Hive