Only have respect for @MikeD and can't say I recall a time I've disagreed with his knowledge. Ultimately, my concern is with what happens inside the aircraft and how it can be made better. It's easy to sit back and talk about what you would do given hypothetical situations given the chaos of any emergency situation. I sometimes play devils advocate regardless of my true beliefs to gain contrast into other perspectives.
I'm with you. Why people do certain things in a given stressful situation will widely vary from individual to individual, culture to culture, etc. These are just the challenges that have to be dealt with, and no two incidents will ever be the same as it comes to many factors, pax reactions being one of them. Just have to be flexible as possible as a fire crew, and play the cards we're dealt as best we can.