I think there's bias from all parties during an interview. That's why having union representation is important. More perspectives lead to a better selection/result. Less perspective leads to worse outcomes.
FWIW, I've flown with a lot of pilots coming to us from regionals, 135 and corporate who bring a lot to the table. Often my strengths compliment their weaknesses and their strengths compliment my weaknesses. The problem isn't the human beings we're hiring. The problem is how we are training and treating them once they are here. We're consistently failing our pilots and relying on the knowledge they bring rather than the knowledge we imbue. Unfortunately, I haven't seen the company own their failures and announce any corrective action yet. There's still a lot of public back-patting going on at all levels despite killing three people. This makes me think we are still dangerously out of touch.