ADHD diagnoses often come after teacher complaints about sitting still, finishing work, or disrupting class, not after a careful differential that rules out sleep debt, anxiety, trauma, language problems, or a classroom that expects six-year-olds to do seatwork for long stretches. Once the label is on the chart, a stimulant is the default next step. Methylphenidate and amphetamines work quickly, so the classroom gets quieter and the parent gets relief. That feedback loop does not require the drug to be fixing a discrete brain disease.
DSM criteria were written around childhood impairment, then expanded; adult diagnosis grew even faster once “executive dysfunction” became a popular self-description. Someone who was called smart-but-lazy built coping habits, and later maps the old friction onto a medical term they first heard at 34.
There is a diagnostic and prescribing system, especially for boys who annoy adults, and a cultural script that now invites adults to reinterpret old difficulties as undiagnosed disability.