I've never really found this line of comparison personally satisfying but I struggle to communicate why. Here's a shot:
A first-world country should be able to provide basic infrastructure without the population spending their extra time hunting and gathering and learning skills that are functionally useless in the modern world. The fact that we don't have to spend our time scrounging for water (and learning primitive survival skills) is why we have an innovation economy worth trillions instead of subsistence farms worth nothing. The failing is on the national infrastructure, not on people who don't choose to collect survival gear. People in countries who have it much worse do not make the failing here better.
Additionally, I suspect many of the people with backup generators, water purification methods, hunting skills, etc, are people like me: who have the time and money to spend learning/buying these things as a hobby instead of struggling all the time.
And, people get killed when the power and water goes out in the US. Those people are just as dead as anyone who starves in an undeveloped country.