If you're roleplaying both sides then the Aura side would also need to optimize by never using remove her collar, avoiding as much lewdness/corruption/vice as she could, and never triggering a pink scene. I'm not saying it's not heavily biased toward losing, but that's also just the game in general.
For the record, there are pure runs of this game, they just don't mesh well with trying to optimally corrupt the main character. Corruption vs non corruption choices often seem to be worse when you don't take the corruption choice, but there are usually hidden positives to taking the non corruption choice, or long term consequences you have to deal with from taking the corruption option. From what I have seen, most people aren't trying to roleplay both Alicia and Aura acting optimally when they play. The game tries to accommodates a bunch of different playstyles, which I appreciate.