Looking at evpsych and realizing that this kind of behavior is actually normal has helped me to accept that I don't need to feel guilty about being less ethical than I actually am

Now that is an interesting take on the matter. Thank you, Kaj.

Of course, before the "realization" that your misdemeanours were caused by lawful physical malfunctions of your brain, rather than by a nonphysical black box called your "self", one could always entertain the illusion that misbehaviour was, for oneself, an abberation which would be expunged if only you really tried hard enough. To realize that it is the default scenario is saddening.