Because it's sensible?
growing up, my dad always told me to have tins in the cupboard, candles, matches, a lighter, a torch, batteries, a longwave radio in the house. And it's just common sense.
If there's a nationwide wifi/4G/internet outage, accompanied by a power cut (because national grid is highly reliant on comms 'in the cloud', how would we get anywhere and how would the Govt communicate with us to tell us what's happening?
it's just common sense, not prepping or panicking.