His Prof (Prof B at DeSales) said he was into Rational Choice Theory and Script Theory. RCT was, I believe, the invention of economists (who do not use their models to study behavior, per se - but to factor things into various economic models to try and figure out what's going on).
Anyway, RTC theory in criminology is controversial and claims that a good number of criminals are not impulsive nor insane nor agitated. They carefully and rationally plan out how to evade risk, have a sort of diagram in their mind as to how to deal with various things that could get them caught. Script Theory based on RCT would say that the criminal then writes a kind of script (either mentally or literally) and goes by that script. I can't imagine that the original premise of a criminal is to "act rationally" if they are in fact planning a crime, but beyond that, the Criminal is given a lot of credit for reasoning. What time of day? Which place to target? Who is capable of self-defense and who is not? Where to dispose of evidence. What to bring in the kill kit. Etc.
So it's always been plausible that Kohberger did leave an open zipping duffel right by his car, was already undressing as he ran out the door. Threw his shoes into the bag, then his outerwear and mask, and finally, that used pair of gloves. He likely would have practiced these various parts of the script, just like an actor.
Bottom line for RCT: Individuals commit crimes, using their own minds and brains. They have a self-interested goal (that they consider rational). Behavior is freely chosen. Choice is used to gain maximum personal pleasure in the commission of the crime.
From a LE perspective, dealing with such an individual effectively (according to the theory's proponents) means the State must deal out swift, severe and certain punishment (so that the criminal mind has to take that into account and the plans get more and more difficult to make). I found a good .pdf on it.
Oddly, we know that this doesn't exactly work in economics (people buy things they can't afford and get into issues with repossession or debt collection all the time, obviously). We know that many compulsions and addictions cause non-rational behavior. Even in something as apparently rational as buying a car, people can let feelings overwhelm them.
IMO.