Interesting. It's how I have always lived really. I'm not sure how long they are planning to ask us to be prepped for, but in the 40 years I've been running a household, I've always kept enough in that it wouldn't matter if something happened and I couldn't get to the shops for a 2-3 weeks. I could go longer but the meals would get a bit odd!
I don't think of myself as a pepper, none of this is done for the apocalypse, more if I was ill or injured or when I was younger, if money was tight one month.
I remember being surprised when a young colleague was panicked about toilet rolls within a few days of the big crisis because she was down to her last one. I have always had a spare pack "in stock", replaced as soon as the penulitmate one is opened, the same with all other non perishable things I use regularly.
I always keep a few bottles of water in the garage too, although it's been there a long time, I'm not sure how keen I'd be to drink it!
When I got married an aunt gave me a box of candles "for when the lights fail". Being prepared is just what people did, we have become too reliant on "them" fixing everything for us.