Diagnosed ADHD and hyperactive dude here.

Multitasking is a skill which deminishes with age (by exoerience). What you are refering to is information overload - you are not providing feed to your brain but draining your lifetime.

Imho this is due to bad habits not ADHD. You are still capable of restricting your attention to more sustainable things. Or to things others may benefit from. To me it is egoistic..!