What's 'courting in a scan' ? If you mean retouching yeah, even a cheap wacom is way better than a mouse.
TBH I don't think tablets hold any real advantage over real media for creating original pencil/pen/brush artwork, even factoring in all the layering, erasing, undo etc. shit. Principle drawback is that you aren't looking at your drawing implement, lack of tactile feedback etc. Plus maybe it's too easy to get caught up in the layering, erasing, undo etc. shit and wind up with really overworked, but conceptually undisciplined results. Maybe the best of both worlds is to use real media, scan it, then digitally manipulate it in various ways.
EDITED: 25 Oct 2016 13:52 by DSMITHHFX