I don't think this is about laziness vs. ease of play so much as it is a case of logic and game believability. I guess in order for me to be convinced this would be bad for the game I would need someone to explain exactly what they think their character is learning to do when they train herbalism.
I'm starting to think the only reason people don't like this idea is because they went through and did "the work" of creating these lists and this book, and it would make them feel less elite if new scouts were "handed" this ability. While it is really funny to watch a scout try eating sleep herbs and such, but really, is it really too much to give scouts at least a small base of knowledge or an ability to recall herbs that they have already eaten or classified?
I don't think this is a monumental change that really deserves the argument that it is getting, and I think it is just that some egos might be hurt if one of these changes might go through. It reminds me of freshmen hazing with the mentality of "I went through it-you should too!"
