Much like everything else, weed has potential to be whatever you want it to be. If it's readily available, you enjoy it, and you're aware of the benefits/risks, then you can absolutely use it as a psychedelic. Psychedelics produce changes in perception, mood and cognitive processes; weed does the same thing. You should be setting your intention before using it. I, like others have stated, have had some major breakthroughs while high. I'd say that smoking was the catalyst to the start of my enlightenment journey.
Do your own research, and by that I mean, act as your own test subject and see what works best for you and what you want out of the experience. That is the only way to know the true answer for yourself. It may be completely different for someone else.