It sounds to me like she intentionally phrased it so it could apply to both of them, and maybe be interpreted to apply to the several news outlets owned by billionaires as well (fox news, washington post, etc.). It's a weirdly common feature of our dystopia at this point, and I think that's what she was expressing exhaustion with. So while she may not have initially intended to exclude Musk, I genuinely think it wasn't just about him, and phrasing her reply in this way was funny and pretty much guaranteed to get more people to see the message.