I agree with you that most of human psychology is on a spectrum and that there is no shame in having a mental disorder or in seeking treatment for it, so I'm not sure if you're disagreeing with me or adding more information. At the same time, I think we should be cautious about suggesting to someone that they have a particular mental disorder for a behavior that is common.
A psychiatrist or neurologist would want to know significantly more about the original commenter than "Procrastination is an addiction [for me]... I've been praised for my excellent work and rewarded with raises and bonuses, even though I often procrastinate until the very last minute" before deciding that they had ADHD. That experience exists well beyond the 5% of the population that has ADHD and in my opinion is not nearly close to sufficient in the DSM-5 to suggest ADHD, particularly as even extremely severe procrastination can explained by a number of other causes.
A psychiatrist or neurologist would want to know significantly more about the original commenter than "Procrastination is an addiction [for me]... I've been praised for my excellent work and rewarded with raises and bonuses, even though I often procrastinate until the very last minute" before deciding that they had ADHD. That experience exists well beyond the 5% of the population that has ADHD and in my opinion is not nearly close to sufficient in the DSM-5 to suggest ADHD, particularly as even extremely severe procrastination can explained by a number of other causes.