Compartmentalization. Plenty of stimulant and H and other drug abusers in tech.

Sugar and alcohol are addictive and addictions are irrational and you can't use rational objective thought to get out of a situation that is inherently irrational and subjective, like addiction.

Essentially zero H users, for example, have never heard the news that H is bad for them. Can't just concentrate hard enough to get out of an addiction, they don't work that way. So it is with alcohol, sugar, carb binging in general, etc.