I’ve said often having the “stuff” you need is only part. A big part is having the mindset to get through it.
Hunger can bring out the worst in people, but so can many other things. What about extreme sleep deprivation? Heat or cold, or wet and being unable to get warm? Unfamiliar circumstances and places?
And as much as we can complain about our sundry humdrum predictable lives, what about extreme unpredictability?
All of these factors will stress people. And a person under stress is more likely to make a mistake.