I get your point, but you have to remember that "drag racing" is a generic term. Try looking up "drag race" in the dictionary and you will find that it is simply "an acceleration contest between vehicles" per Webster's and "a race between two or more automobiles starting from a standstill, the winner being the car that can accelerate the fastest" per Dictionary.com.
Those are a sample of the accepted definitions and why the term is used the way it is in the media and most everywhere else outside of the formal sport of drag racing (i.e. NHRA, IHRA, etc.).