Well, people have always "stockpiled". Particularly before modern transportation, emergency services, and refrigeration.
I guess you can always be "Mr./Mrs. Super Negative" and eventually, if you live long enough, you'll probably be correct.
Remember that "When something happens" could be tomorrow or 2000 years from now. I have more faith in America than to get all overly worried. I don't want to lose the present for the negative-future-fear. But, I don't see any harm in some minor stockpile...say a month's worth or even 3 month's worth of canned goods or whatever. But more than that....not for me.
OTOH, the nicotine thing for my DIY is so easily purchased in small containers and stored....heck...I got a year's worth in one order and now I'm good with it.
I think it's a matter of balance. And a bit of optimism combined with rational preparation.
Nothing wrong with optimism. Far better than cynicism. However, some of us are happy fellows, family men like myself, who both enjoy our lives and our families, and are happy to be so fortunate in life. And YET, we also see on the horizon , what has been coming for a LONG time. You are correct, it could happen in a few weeks from now, few years, or maybe a few decades. Nonetheless, as I mentioned it isn't a matter of "if", it is a matter of "when", and I think it is important for ALL families to prepare.
For me, preparation doesn't mean being paranoid, worried, or completely changing your lifestyle around. Quite the opposite. For me, preparation is like I mentioned above, making sure I have enough food, water, and all the basics like
batteries and everything else to keep my family safe for at least a month.
I'm optimistic in that I think mankind , whether prepared or not, always manages to adjust to whatever becomes our reality, and we continue on. However, history is a beautiful thing to study, and history teaches us that stability doesn't last, and furthermore, there are signs to watch for that are indicators of collapse, all of which are apparent now.
