Obviously you've never had the pleasure of working for a carrier with a 50% bust rate. I have: ACA ca 1999-2000 when more than half the CRJ captain candidates pincked on their upgrade. A few years later at World 6 FO's pinked on their recurrent in a relatively short time-frame. Must be a lot of "well-trained candidates" simply having "bad days." Your "hundreds of PC's" don't give you a snapshot outside of your own carrier. There are a lot of low-budget, substandard training departments out there with a lot of reprehensible, low-life dirtbags running around with their little pink pads and tiny wangs.
I can remember more than one of apologist at ACA who came from another training program within the company. He publicly berated those who failed as simply "not devoting themselves" to the CRJ training program. He had the shortsightedness of making this statement just before going through the training program himself -- and failing. Your statement is eerily similar.
As long as checkrides are subjective, they should not be used as a sole determinant in whether one gets to continue feeding their families. Have a computer grading the event is a step in the right direction.
You are taking the words right out of my mouth, thanks!