I think gendering language is dumb, but women do tend to use more expressive language like exclamation points to “soften” our communication. Not that men never do, but I do think there are different standards of “professionalism” depending on how you are perceived to fit into the social order.
Okay, I've probably included an exclamation mark after a "thanks", but that's a very different usage than "I find this outrageous!" which is more like "I'm shocked, shocked to find out that gambling is going on in here!"
That's about the only use case of exclamation mark I have in professional, corporate communications. Unless we take "professional" to mean "stuff people do to make money" - at which point, well, let's say that the stuff I read when working at small companies was often below what I'd consider baseline in a civilized society. And the spelling! One of the nicer things about working for bigger companies is that people feel they need to put some minimum effort into communicating, and don't just dump their stream of thoughts as fast as they can type.
