Ed, it seems to me you are having trouble focusing in on what you are trying to say. I really can't tell what it is you are trying to get across here. "I’ve always had the opinion that everyone has an opinion.." what does that mean, exactly? Are all opinions really valid? Does someone who beleives that Santa Claus is the creator of all life on the planet earth have a valid opinion? How about someone who thinks tigers would remain in perfect health if you kept them in a cage and feed them nothing but marshmallows and chocolate syrup? Is that a valid opinion? Again, I don't understand what you are saying.
I do agree with you that we should try to get as many different opinions and beliefs as possible to look at so we can make a better and more informed plan in keeping our animals healthy. But we can't always have a guarantee that the person's opinions are actually based on fact, so we must use common sense and look at the bigger picture.
Of course most people write articles or books based on their opinions. What else would they base the writings on? What they DON'T believe? Someone else's opinion? The opinion of their minister? I'm not trying to be mean here and I'm not attacking you, I just wish I could understand better what you are trying to say.
You say that some writers put unpublished experiments in their books and that is bad. The thing is, just because someone has their findings published and supposedly "verified" does not make it factual. No matter what a person finds in his/her personal studies, there will be people who say "yup, that is so true," and there will be plenty who say, "No, no, no. Wrong!" If we waited for so-called "proof" of something, we would never be able to read one word of what a person has found out about chelonians because there would be nothing but bickering about whether it is true or not. If someone wanted to write a book about the natural diet of zebras, he would go to Africa and find some zebras and follow them around to see what they ate. He would see that they ate grasses and plants. Then he would ask other people who have observed zebra what they have seen the zebras eat, and they would tell him "grasses and plants." Then he would write in his book that zebras eat grasses and plants and he would state it as fact. He wouldn't say, "UHH, I think maybe it is possibe, but it is just my opinion you understand, that maybe, just maybe, zebras eat grass and stuff like that." And that is the way it should be because as far as he knows, it IS a fact. I say to the writers of books on any subject...tell me what your observations are, I have the ability to distinguish fact from fiction MOST of the time by using common sense. If a bunch of people all seem to be saying the same thing, chances are good it is factual. The only way to be really positive is to do your own experiments.