That's a cultural thing. In many cultures exclamation points come across as demands/accusations, not emphasis.
An exclamation point from a partner at a law firm... probably hits a little different!
But in more informal communication, I think exclamation points are good because they help convey tone and energy in a way that is often lacking. It helps break up a message that can otherwise feel flat and cold.
The same message ending in an exclamation point would have been substantially less nerve-wracking :grimacing: