Under tight schedules it seems like big stills always end up being last minute fixes to get the show to render or to export. Even when care is taken to recreate moves in AE, Things get missed in the rush.
Also have an editor that insists on making his own images and doesn't like hearing that FCP has limits.
So, like I said, mainly just curiosity. It's generally not an issue until it is, you know what I mean.