Earlier quoted context omitted.
So my neighbours hate me, but somehow major disaster changes that? > won't allow looters in the neighborhood My neighbours will be the first one to "equally share" everything I have with random junkies. > if you die ... your preparation can save someone else's life. Yeah, my neighbours make sure I die, and my stash will save their life.
You're getting unfairly downvoted. Yes, in a perfect world, we all have great, wholesome, cooperative neighbors who will help us out in an emergency. But we don't really choose our neighbors, and the sad reality is there are a lot of (and more and more these days) really shitty people out there, and by random chance you might be stuck with a neighbor who would rather rob you during a disaster than help you.
A natural disaster ties together the fates of everyone living in the area. When law and order break down, the people living nearest to you are the most important guarantors of your own safety. Attack or hurt your neighbor and you've only made yourself less safe from outsiders.
All this to say the neighbor would have to be particularly stupid, short-sighted, and sociopathic. Or have a foolproof survival or evacuation plan. Other than that, your survival and co-operation is in their best interest.