The purpose of an engineer is to solve problems.
Engineers solve real-world problems: when they make simplifying assumptions, they try to avoid transparent falsehoods like "a market functions with perfect transparency," and "all players in a market behave rationally." Hell, there's no way to even check the latter statement for truth: destroying a major company to build your relatively minor personal fortune may or may not be rational. If any solid engineering had been invested into the mortgage market of the past decade, the ultra-rich would not have cleaned up by throwing the economy into turmoil. Yet somehow, they have been able to do so, and if anybody ever goes to jail for this type of fraud, it will be a pawn like you.
Occasionally, engineers do fuck up [[http://en.wikipedia.org/wiki/Tacoma_Narrows_Bridge_%281940%29]], but when you look at major economic events from the eighties [[http://en.wikipedia.org/wiki/S%26L_crisis]], nineties [[http://en.wikipedia.org/wiki/Enron]], and today [[http://en.wikipedia.org/wiki/Credit_default_swap]], it seems slanderous for you to mention your particular brand of snake-oil in the same sentence as "engineering."