See the word in bold. That's a key word in your comment. I'm not a JJ apologist, and in fact think he is a poor GM, but this isn't 1989, and Jerry has been operating and maneuvering in the NFL for over 30 years at this point. He clearly does have qualifications and knowledge typical fans in the stands do not. Again, I'm not saying Jerry is a good GM, but it's plain wrong to suggest any typical fan would be as qualified as he is.
What you are doing is called a circular argument, and it is illogical.
They never had, and they still DO NOT. The proof is overwhelming; 28 years & counting, NFL records for longest tenures with not even a conference title game appearance.
Just because Jerry cannot be fired, and that results in the longest tenure (an ongoing NFL record for longest failed tenure) that does not automatically confer qualifications on a person especially when they produce only failure.
The emperor has no clothes and it doesn't matter that he has been both emperor and naked for 28 years and that no one can force him to put clothes on. He still has no clothing on. No amount of years being untouchable is going to suddenly count as no longer being naked.