Tourist
I've got a lot of sympathy for you on this one. I am not aircrew, but I do think as an engineer I fill the published requirements. I think that there are many trades/specialisations which don't obviously fit the criteria though. Shineys, stackers, plods, rocks, fitters and turners, etc would all fit that list. But, and a big but, many of them do bring things to the discussion which we are probably too blinkered to see. We are all guilty of making the odd ill considered post, (excepting BEagle of course, who is never wrong), but I think the balance is generally okay, and most people try not to post where they know bugger all. There are exceptions of course, and they stand out like a dogs nads.
S_H