At, say 420 KIAS and 250 ft, where the effect of wind is less, I concede that the LL technique is fine. But at 2500 ft and 90 KIAS, a wind needs to be pre-planned and time at waypoints pre-calculated.
Learn the basics first - including how to use the back of the computer. Then move on to other techniques.
I'm not suggesting, by the way, that there's a need to take the Dalton into the air - just use it pre-flight and then correct in flight using normal techniques.
I had one Qualified Service Pilot who thought that still-air planning and in-flight correction by observed error would be OK at medium level in a Cherokee......