The scary-cool name is there to help defenders take it seriously. If you give them a stupid name, elected leaders, business executives, and military leaders won’t take them seriously. It also becomes easier to tell them apart, and create identities. Who do they like to attack, how do they operate, what level of threat do they pose, etc. And then of course it sounds more impressive when you defeat them. Batman doesn’t get any respect for beating Condiment Man, but if he takes down Darkseid, people take notice.