The fact that reality constantly changes (or is one thing eternally the same, depending on your point of view), doesn't mean that men cannot at least get an approximate grasp on how it changes...if you don't believe, though, that there is such a thing as objective reality, though, then, you are right in disregarding the work of scientists who have done their best to objectively explain how things work.  If that is the case, though, then there are all kinds of moral problems thrown up, especially with regards to how we interact with other people, and how our personal realities affect theirs, if at all.

 

It's true that science does not understand all of the inner mechanisms of things, but I do believe that they are coming, for the most parts, to better and better approximations of how things do work, and very often the gross approximations work well to predict, if not explain, what is going on in the universe.  Take the evolution of physics for an example...Isaac Newton worked out a model of physics that explains/predicts just about everything that goes on on our planet...it's true, you can predict how most things will behave by using the laws of Newtonian physics (which are, by the way, descriptive not proscriptive laws).  But along comes Einstein and shows us that Newton got it close, but not quite right, in the much larger scale (and the much smaller) Newtonian physics breaks down, also Newtonian physics took time as a constant and Einsterin showed that this is not necessarily the case...thus was born the Theory of Relativity...a closer approximation of how the universe works...in our everyday lives, the predictions of Newtonian and Einsteinian physics predict nearly the same things, and in many situations Newton's laws are more useful because their predictions are easier to calculate.  Of couse, nowadays it has been shown that even Einstein's physics isn't even the best approximation we can come up with, and one of the greatest minds of our time, Stephen Hawking, recently lost a bet about the workings of black holes because we are all the time getting to better and better approximations of the true workings of the universe.

 

Does this mean that reality changes, or does it just mean that our perception of it changes?  You may choose to define it either way, but claiming that someone is "weaving scientific sorceries over our realities" is just willfull ignorance, in my opinion.