Literally (ha) all linguists would disagree with you there. The word “literally” here has gone through the same evolution that EVERY WORD GOES THROUGH. EVERY WORD YOU SPEAK went through the same thing where you would call it “less clear” or “useless” or whatever.
Language is always unclear. You do not have the same perception of words as someone else does. If we arbitrarily assigned some word uses as “useless” based on someone’s personal idea of what’s useful, we wouldn’t have language. A lot of people would call articles useless (words like “the” or “a/an”), a lot of people would call pronouns useless (I/you/they/etc.), a lot of people would call marked tense useless (no more past tense or future tense!). A lot of languages don’t have these features. English speakers might think grammatical case is useless. Why do you get to decide what’s useless or not? Why is using “literally” as something for emphasis useless to you, and why do you think it’s so objective that you should have the authority to remove that from the language?