Does anyone know how to wire up mouse events on a map document?

I have found a bunch of example code on how to wire up Add-In tools, but the Add-in I'm creating is a button.

It should be as easy as wiring up event listeners for ActiveView event listeners, but it seems ESRI takes away the ability of clicking on a map because they want to force us to use tools instead of buttons for map interaction??

Maybe a repost of https://gis.stackexchange.com/questions/75985