Hi,
a) Why you add wind additives such headwind and gust to Vref?
b) Why you don’t subtract/add wind additives such tailwind and crosswind to Vref?
It seems Boeing recommends bleeding off headwind additives approaching touchdown.
c) How you can bleed off wind headwind additives approaching touchdown?
d) How you can bleed off other wind additives/subtractives (tailwind, crosswind)?
I mean by subtractive the opposite of additive (if this word exists in English, if not add it to Pprune Dictionary

)
These questions concern all aircraft manufacturers (Boeing, Airbus, Bombardier, Embraer...etc)
Feedback appreciated