Anyone will concede that costs can outweigh benefits for some diagnosed (neuro-untypical/pathological) patients. Is it impossible that benefits outweigh costs in neurotypcal patients? My experience is that professionals are uncomfortable with that thought.
I was one of the kids prescribed stimulants in the early days, circa 1990. Even as a kid, I smelled wierdness.
One doctor prescribed the medication, and asked for teacher feedback. If the drug did its job, then I had ADD. The test was comparing behaviour on & off the drug. If I didn't have ADD, the drug wouldn't work. Later on, the doctor told my mother: "If you take it, it'll do the same thing. It boosts concentration in everyone." This was a slip, kinda. They prefer if patients (and professionals) pretend that "the drug only works if you have the pathology, and is very dangerous if you don't."
I think the medical system is uncofortable about "enhancement" generally. For something to receive treatment, it needs to be a pathology, untypical... I sympathize with the reasoning, "first, do no harm" and also the potential reality of such drug use becoming more common.
Often times, this gets abstract... "what is normal, man."
Anyway, I don't think ADD drug benefits or costs are, in reality, very closely correlated to your unmedicated baseline. Besides biilogy, a big factor is your job/school/environment, and what it takes to perform in that environment. If you're a football player or a film director, add drugs probably won't do much. If you're a chess player or ceo, they probably will, regardless of your unmedicated norm.