just put it this way, there is no upside for them to take the risk and employ someone good but not matching the characteristics.
support functions usually get blamed for doing wrong and not get credit for nothing happening (i.e. doing right).
if they employ someone taking the risk, anything screw up they get the blame. if they simply stick to the rules and employ someone according to all the ticks they have on their own form, if it burns up they track back and cover their track on why they employed this person...
that's how the market work. that's how why everyone always complain about the employers only looking at certificates, and yet when they are the ones employing they hop onto the same wagon.