Do you not think that use of financial instruments is vital for allocating resources in a world of imperfect information?
For me, their utility and necessity is obvious. If you think about it, making stuff that people want is actually rather complicated. The world is rife with hazards and risk; the intricate supply lines upon which production depends are all vulnerable to disasters both natural and human.
Naturally, those whose business it is to produce things and not to speculate on future events would like to be free of such risks. This is true the source of fundamental demand for financial instruments. All the derivatives markets, and zero-sum game apparatuses exist in order to transfer -- and in so doing compute a consensual value of -- these risks to those who believe they are better informed about reality.
While I understand not wanting to personally engage in this process, I claim that that the world is better that these contracts and exchange machinery exist!