I think the Dis is a good place to come and chill and have a good time. If you want to start a thread and post your opinion - Great. If you start a thread, but don't really have an opinion, but think it might be an interesting thread - Great. If you want to start a thread just to stir the waters a bit - Maybe not great, but I don't think it is that bad of a thing.
People like to discuss things. Many of the topics that get discussed I have an opinion on, many of the topics I don't. If I see an interesting question (like Papa Deuce did in this case), and think it might provide some interesting conversation, than what is wrong with posting the question (with or without my own personal opinion)
Are you saying that we should be limited to posting only about things that we have strong personal opinions about? Think about it, most of the people who originally come to the Dis come to find out more about WDW because they don't know enough about it to plan a great trip. Does that mean that they shouldn't post a question unless they already have a well established opinion? I hope not.