No need for tin hat - unless you happen to like wearing them...??
I agree that to rely solely on forecast winds is unwise and also that the effect of incorrect drift or groundspeed calculations resulting from such methodology alone is of less importance at high TAS. BUT, and it is a big BUT, I cannot agree that the elementary skill of using the Dalton for low speed a/c naviagation pre-flight planning has no relevance these days. I know that the other Services still teach their students to use it - and for very good reasons.
An accurate pre-flight planning process using forecast winds will mean that in-flight corrections should be much smaller when correcting by obeserved error using SCA and proportional timing. Not that relevant at low level and high TAS, perhaps, but very definitely of relevance at 90 KIAS and 2500 ft.