I think you are generally correct- but just because someone disagrees with you, or hasn't seen the same information you've seen, doesn't mean it is intellectual dishonesty.
There are good reasons why this seems to be true even if it isn't... you take a hyperactive person with ADHD, because they have poor executive control of motor function, and give them a therapeutic dose of a stimulant, suddenly they can control motor function. It appears on the surface to be almost exactly the opposite of giving someone a high stimulant dose. They appear to be opposite responses, but in fact are the same type of response... it's just that the ADHD person is regaining a level of executive control that the non-ADHD person already had anyways.
There are good reasons why this seems to be true even if it isn't... you take a hyperactive person with ADHD, because they have poor executive control of motor function, and give them a therapeutic dose of a stimulant, suddenly they can control motor function. It appears on the surface to be almost exactly the opposite of giving someone a high stimulant dose. They appear to be opposite responses, but in fact are the same type of response... it's just that the ADHD person is regaining a level of executive control that the non-ADHD person already had anyways.