ITT: a lot of undiagnosed ADHD

Not necessarily, everyone's got their own preferences and sensitivities, it's just how brains work and how it works differently for everyone.

It's too simplistic to just apply a label like ADHD to people. Preferring distraction or silence is only a small part of the diagnostic criteria, and modern diagnostics are more about "how well do you function / how much / what help do you need" than applying a label.