Not always; many words started out as slang and have become part of the lexicon. Consider “google”. It started out as a proper noun and some hipsters began using it as a verb and a few years later it is common usage. In that case there wasn’t a “need” for it since “internet search” conveys the same idea.
“Language is always changing, evolving, and adapting to the needs of its users. This isn’t a bad thing; if English hadn’t changed since, say, 1950, we wouldn’t have words to refer to modems, fax machines, or cable TV. As long as the needs of language users continue to change, so will the language.”
Actually, Stuart Scott popularized the phrase, but he didn’t come up with it. I grew up listening to legendary announcer Ernie Harwell on the AM radio and he used it occasionally. Note: I am not saying Ernie came up with it, I am saying Stuart Scott most definitely did not coin the phrase.
I dunno; the OT version of this God character is a thuggish brute.