Because of the strong connotative charges associated with the adjective averse and its noun aversion, as well as to many synonymous words, such as opposed and opposition, one might do well to select something of similar meaning and softer connotation.
I might suggest forego used as in example:
She set down the sandwich and replied, "Indeed, we did forego PB&Js at the monastery on account of their perceived decadence." She sipped her milk and continued, with a furtive smile, "Of course, we're much more averse to needless starvation than we are to bending the dogmatic principles of our order when they simply do not apply."
The above sloppily-spun pseudo-excerpt serves to illustrate the difference between the idea of to be in opposition of something and the idea of to bypass if possible.
If we need a noun phrase, we could explore use of the word disposition. For example, it may be said that one is not predisposed to PB&Js or that one is of the disposition to forego PB&Js and so on.