To answer that question. I use a BMX for groceries, I'm afraid of crushing my bread, and I can't live without suitable drinking water. No joke.
Who would spend their money on a loaf of crushed bread? Not everybody in this world has the luxury of drinkable water right out of their tap. Its not about the luxury of taste, its about the presence of hazardous chemical contaminants in the water.
Ever since I fixed my truck I haul large heavy items like water, and so forth. I only need the truck maybe once a week now. After taking up cycle commuting I'm beginning to see less of a need for an automobile. For me its more economical to use the store nearby even tough the prices are higher. Why is this you ask? It takes lots of gas, and stress to go to the cheaper store across town. Sometimes it just ends up being cheaper to pay more. I also get to bike to the store nearby.
Not everyone in this world has it so easy. We should do our part to make this world a better place. A better place than we found it. If everyone in this world did only one thing to make another persons life better there would be no more problems.