I would agree, and I am often one of the first people calling for this type of reasoning.
That said, the problem for many is they actually want to help people, who legitimately want to LEARN, actually learn something.
The people we are talking about, the type we get annoyed by, are those who come in with an agenda, an idea that if they "only show us the way" they can convince us, but in order to "get on our good side" or to avoid the "flaming", they POSE as an innocent newcomer "Just asking questions".
You are right, ultimately where they stand on the issue is not the most important thing, but for some, it allows them to "not waste their breath", their typing, THEIR TIME, if they know they are dealing with a truther, who they will not convince, and is just here to antagonize, versus a LEGITIMATE inquirer, who really does have questions that they do not have the answers to.
just my 2c.
TAM