Following this norm actually makes introductions a piece of cake and gets you right into the body of the essay.
Here is the norm: Following this norm allows you to cut to the chase.
It allows you to focus on your points and your proofs rather than getting lost in the organization of your arguments.
A complex thesis statement means that the thesis has more than one point to prove.
Thus, to attempt to single out or make a distinction of a piece for using "symbolism" is to not say anything that even needs proving to begin with.
A simple thesis statement is not quite what it may sound like.
The academic essay is merely a specific writing genreas is the love letter, newspaper editorial, or pop-fiction.