Thankfully, no one born prior to 1980 has ever said anything inappropriate
The apparent misuse of "Literally" does not present a barrier to effective communication. In fact, "the kids" seem to understand its use in this context. It is therefore, in my view of language, a valid use of the term.
Of course you may view things differently. But very few of us exhibit perfect grammar. We are simply unware or ignorant of the many ways in which we break the rules.
Just as we might look down on those that deploy literally for emphasis, there are those that take a dim view of our approach to the language.