Because it’s a spectrum everyone is on. Clinical diagnosis asks “how many,” “how often,” and “is it causing problems” to locate a patient on the spectrum. That is, yes ADHD patients’ experiences are mostly common; it’s the rate of recurrence and their control of it that is not.

Also, many are undiagnosed so when I see comments saying “but that’s what it’s like for everyone, almost all of these memes apply to me” I sometimes feel I should ask how many apply, how often, and is it causing problems.