In your opinion, how reliable is the dream?

There is a whole issue in halacha about the reliability of dreams. There are rabbis, Rashba, Rajachovi, and more and more. There are those who only accept 'excommunication' in a dream, there are also 'tzedakah' and more.

Either way, it seems that everyone perceives that dreams are some kind of objective dimension (in one form or another). How can this be understood today? It seems to me that you believe that dreams do not have any real dimension. Do you have a creative (rational) interpretation of these poskim or the issue in the Gemara or do you believe that this is a mistake, but that halakha is halakha and should not be deviated from?
 
Maybe I wrote things in an incomprehensible way, but I would love for you to expand on that.