Interesting, I hadn't considered this as a point of confusion... I think it depends on the mental model and language you use.
In PlayMaker a state listens for events. Transitions to other state are triggered by events. Events are "sent" either by Unity (MonoBehaviour Events for mouse, physics etc.) or by actions. So Send Event seemed like the logical thing to call it.
I wonder if the concept of Events and Transitions are getting confused?
Events are not unique to an FSM, they are shared across the project. They are basically just a name.
Transitions are unique to an FSM, they define a link to a specific state.
A transition is triggered by an event.
So you send an event to trigger a transition.
Since transitions are not named, maybe you're thinking of the event as the transition...?
I tried to make this clear in the Core Concepts page:
https://hutonggames.fogbugz.com/default.asp?W133But maybe that's not so easy to find...? Or not clear?