I have my own ideas about this, but I could be wrong. There are, I am sure those that being a 'pro' feel they have paid their dues, and therefore since they make a living at this, they have the right to charge you. Could be. Then again, how do we define a 'pro' Ken Rockwell sure would be on the list that is too long to go into here. One definition I heard years ago, was if you take money for it, you are a pro. Well maybe, but I for one, and I am sure others have sold a print or two, but by no means would I ever consider myself a pro. Then there are those who have been at it for so long they think you are an idiot if you are a beginner. There are many on some forums who must feel this way, and will be quick to let you know it should you ask a mundane question. They have forgot that they too, were once beginners. This mode of thinking is not, by the way confined to PHOTOGRAPHY-- TRUST ME ONE THIS ONE.
I have always felt that knowledge not shared is mostly wasted -- I hope I am not alone in this thinking. This forum, and I hope most of them, are, or should be, about sharing. You can learn from the beginner, as well as the advanced, and everyone in between. What some know to be fact, and what some covet as their opinion, can be two different birds. One must gather all the information one can, and try to sort it out as valid or fiction.
Free information abounds and is worth what it costs. MAYBE --- I find second and fifth opinions a big help. You are never too old, nor are you ever too learned to acquire more information. There will always be those that think, they know it all -- all I can say, is good luck to them. Don't be put off by these types. Just move on, buy a book and keep searching.