Sure, this is a spin heavy subject which is why the term is related. People want to fix a major problem and IMO go overboard when the underlying problem needs no exaggeration.
Anyway, 1/4 is from someone with access to raw data who spent some time trying to get less biased numbers. So, wider error bars than NTSB estimates, but less biased assumptions.
Drunk driving is still a major issue, but there is a reason people are still spouting 20 year old data. When trying to make a point there is a tendency to cherry pick to the point of distortion.
I sloppily implied causation above, but I didn't actually say 1/3 of crashes are attributable to alcohol, I said that a "big chunk" are attributable to poor decisions and separately pointed out the large percentage of fatal crashes involving alcohol.