There you are, in the middle of baking cookies when you realize that you are out of flour. You run to the nearest store to buy more flour, how long until you return?
run? not drive? ugh, that would be more than 90 minutes, about 2+ hours hill down & up again 
by car: 15 - 30 min 
and i would never ever do it on my feet! not even in case of starvation 
I could also order it online and get it DELIVERED to my door in less than 20 minutes, which is a strange state of affairs but true.
When Chuck Norris bakes cookies for his enemies, he adds his own secret ingredient to make a special taste. It’s called “defeat”.
Yeah, driving would be the much better option
I’ve had groceries delivered once, but took 4 hours. I’m sure there’s faster services though. 20 minutes is tops!