Unfortunately, the world is so complicated that we can't make an informed decision based on speech/writing alone, and verification of achievements is one of the easiest and most accurate ways to judge credibility.
We should give opinions based on evidence, proven evidence. The rest are just, personal viewpoints who doesn't care what you prove. I try always to avoid these discussions, but sometimes i feel is a bit unfair to bring up the "show me your X card, sir" to talk about something.
Unfortunately, the world is so complicated that we can't make an informed decision based on speech/writing alone, and verification of achievements is one of the easiest and most accurate ways to judge credibility.