I can't really see how emojis are "vague", or ambiguous. And even if: ambiguity is a great feature in any form of communication, by allowing us, for example, to

I can't really see how emojis are "vague", or ambiguous. And even if: ambiguity is a great feature in any form of communication, by allowing us, for example, to express criticism early and subtle, defusing social problems before they blow up. I also think you're placing to much value on some vague notion of "professionalism" which seems to exclude all emotion and any fun. "Professionalism" in this sense stymies business success by, for example, prohibiting the effective means of communication people choose for themselves with some nebulous argument to appearances.