I'll grant you that a car is more convenient for carrying cargo. But with a bike trailer, a bicycle can pretty easily handle most people's cargo requirements—anything from groceries to large appliances like refrigerators. Check out some of these bicycle trailer plans: https://bikecart.pedalpeople.coop
The cargo argument comes up all the time. No, you don't need to buy a truck for the trip to a hardware store. I know some people do, but they often visit the hardware store every day, the majority of people don't. Yet everyone drives a truck up in Montana, I mean so do I, but it was $800 and I can maintain it myself since I bike primarily.
I'll grant you that a car is more convenient for carrying cargo. But with a bike trailer, a bicycle can pretty easily handle most people's cargo requirements—anything from groceries to large appliances like refrigerators. Check out some of these bicycle trailer plans: https://bikecart.pedalpeople.coop