For the same reason people think Max v Holloway was a robbery - because BJ did more damage in the round he won, than GSP did in the rounds he won.
There are 2 types of people who think this way:
- Those that, in the quiet times before going to sleep, they admit to themselves that they are not basing it on the 10 point must system, and that it's more emotional than rational.
- Those that score it based on how they think scoring SHOULD BE, instead of how it IS.
But mostly it's just a "Diaz 245" sort of sheeple mentality. Don't ake these folks too seriously - they're not worth the energy.