In my opinion the reason could be that sapevet is a command line program you run at the operating system level, and normally there is no access.
It is more convenient to fire events with a report that calls FM P_EVENT_RAISE.
By the way, the tag SAP Event Management refers to component of Supply Change Execution, not related to the batch jobs events.
Best regards, Rafael
Thanks, you are right about the FM if one only lives w/in SAP. I like SAPEVT to call events from outside the SAP system. E.g. you can have a "real-time" kick-off of from an external customer w/o having to wrestle with/explain "Restful" mumbo jumbo. I am just at a loss why SAP does not tout SAPEVT more.