I personally do trust my dreams for insight, but I often take them with a grain of salt. Just like events waking life, some dreams are deep and carry insight, and should be taken seriously, while other dreams are more just silly and for fun, though they might carry with them some message as well. In waking life, things are much the same way. You have to do the important serious things like going to work and taking care of yourself and your family, but there are also laid back moments in your life that don't really count for anything, or things in your life that you do just for fun.

Dreams can have deep meaning but it's an important skill to be able to differentiate between what dreams/elements of your dreams are carrying this meaning, and what elements are just the dream being random or exist because of day residue.