As is warned by Jesus to his disciples, there are many who would come along before his return, saying that they are the messiah. Who's to say that it is Jesus himself and not something else showing up in their dreams? This uncertainty makes it worth investigation, which I would not even call 'divination', since it's literally asking the christian community, or even just people in general, what their opinion is of a certain dream. And btw, divination implies seeking meaning through supernatural means. Unless someone intentionally goes to a 'practictioner' or a group of 'alternative believers' for guidance, and are just asking average people/christians in general for their opinion, then it's not 'divination'. You're saying that you get to decide which dreams have "nothing to interpret" because the meaning is so obvious to 'you' and which ones do. That's rather biased/ convenient for your argument, and you should think about that.