UAS flying training is aimed at producing potential fast-jet pilots. At 420 kts (7 nm/min) the effect of drift is very small. You need 70 kts of wind to get 10 degrees of drift! If you think I'm going to get a DC out at 250 ft at that sort of speed you must be mad.
Military navigation is based on the premis of maintaining track and regaining track asap, which is usually your only tactical option. MDR works very well for this. PPL level navigation seems to be based on blindly following a plan adjusted for imprecise winds until you find you are miles off track and then making a correction to achieve your planned turning point. What is the point of planning a route to carefully avoid problems like controlled airspace, resticted areas etc and allowing yourself to wander off track. Any wonder we see so many reports of PPL traffic infringing.
MDR is great for maintaining track. I would rather be on track than blunder into a restricted/danger area. It relies on a basic understanding of the triangle of velocities and provides a quick, simple and acurate (as acurate as the met man's wind forecast) means of getting from A to B. It'll do for me.