For those who need it it makes mind-numbingly boring stuff such as homework (as opposed to reading history books or creating elaborate formulas etc etc) less painful.
I don't know about you but I personally have seen some examples that have gotten significantly improved lives because of it.
If you don't know this stuff first hand, please refrain from making broad statements about it.
BTW, I'll give you this: one of the most interesting explanations I saw was that ADHD is very overdiagnosed - and at the same time underdiagnosed.
Some people get ADHD meds that shouldn't have, others struggle for years because some people have irrational fear against stimulats.
Can we try to avoid moving that needle and instead try to lower the errors on both sides?