Most of the population have no idea how complex supply chains are these days, and it all works ok until there's a blip in buying behaviour that hasn't been factored into the software - weather, terrorism, covid, ships getting stuck etc. Businesses have evolved to the "just in time" model, virtually no-one has parts sitting on a shelf in a store room because that's money tied up in assets - unless you're the Allams and have made your business doing exactly that.
All this is a long-winded way of saying - it's more complicated than just blaming the media alone. The collective memory of rationing has long gone, the memory of the 1970s is fading for us old gits - people don't run their lives like they did 20, 50, 80 years ago, we're a consumer society and we want to buy what we want when we want it, and we react badly when we can't.
I think this is how its going to be for the foreseeable - more of these unexpected shortages at the point of consumption. Who knew that a consequence of not making fertiliser would lead to less CO2 and shortages of fresh food? We're a resourceful nation and I have no doubt that we'll be ok in the long run, but it may be uncomfortable for a while as the consequences of the decisions and events of the past couple of years are worked through.