Why do people still buy whole crab or crab legs over just getting the jar of crab meat?

These things are sold by the pound. That means most of the weight is the shell which would be 99% shell 1% meat. This is a rip off. Next time you are at Ralph’s why not just grab the jar of crab meat instead which is more meat for less money? For crab…this is one of the few times you can buy a food in a jar and have it not be a rip off.