If I want to figure out where I'm supposed to go to kill 8 marmots (or whatever), I open my mission map. But the mission map doesn't show the location of nearby aetherytes. So I've got to memorize the map coordinates, then close out of the mission map, close out the Mission card, close out the Journal, and then open up my main map, open up the appropriate map location, and scroll around until I find the map coordinate
Yea this can be pretty annoying, I've had to do the same thing numerous times.