I we're running from a lion I don't have to be faster than the lion, just faster than you.
I lock my doors for the same reason. My lock won't keep out someone determined to get in but they'll dissuade a casual opportunist.
90% of us would be better classed as the gazelle in this analogy. Even the lions would be fighting each other for dominance.
> If you want a preview, study famous famines and sieges, like the siege of Stalingrad, and the Holodomor
Most hardcore preppers either live outside a city or plan to escape the city pretty quickly, so I don't know what Stalingrad is supposed to prove. Were their people with remote bunkers and years of food supplies when holodomor happened?