https://www.merriam-webster.com/dictionary/literally
See #2 for why that isn’t a good argument. Dictionaries describe common usage, even when that usage is/was just litterally wrong. If I made a meme with that used the second definition of literally people would be right to point out that it would be much better to use the first. In this meme’s case it also just furthers the misunderstanding of the term gaslighting.