Stats,
The guys who post on umpire boards are the college professors of umpiring.
Of course they're going to say that umpires are robotically objective.
I live in the real world. I'm blue collar. I hang with umpires and cops (same mentality).
Two 18 yr-olds are pulled over for rolling through a stop sign. A borderline call. The super-respectful one gets a verbal warning. The sullen-looking one gets a ticket. It's not "predetermined". It's about "likability factor", and it's about respect, which flows both ways. It's the same on a HS ballfield. Let's keep it real.