Literally Plato's Cave.
SuddenDownpour
Humans are rationalizing creatures, much more than rational ones. Our first gut reaction is trying to make sense of why we think what we think and why we behave how we behave, rather than trying to figure out if it does actually make sense. If this natural tendency could be changed, the world would be far less of a shithole.
The overall point aside, people don't take Adderall because they want a kick, they take it because they need it to be functional. I'd say that you have to be either ignorant or an asshole to call someone a druggie for regularly taking Adderall, but you know, 4chan, ignorant, asshole, redundancy, yadda yadda.
Edit: Jumping to the conclusion that people take Adderall because they want to get high feeds the stigma that people with ADHD are just drug abusers, which is a core reason why people with ADHD have so much trouble accessing their medication. If someone wants to get high, there's little reason to go for Adderall rather than drugs actually designed to get you high.
Giftedness easily becomes a social disability if your environment isn't good for it. The education system isn't ready to handle you constantly being ahead of the class? Get ready to sleep in school as the best years to take advantage of it pass by. Your topics of interest are too complex for everyone else around? Have fun enjoying your friendships less than everyone else. You don't mask your intelligence? Here, have 10 lottery tickets to get bullied, no, you can't return them. Congratulations, you graduated from college. Do you have the money for a masters degree? Oops, guess you studied for nothing. Got into debt and got a masters, but the job market isn't booming? Do you have rich parents, or rich friends? Aw shucks, guess you couldn't network your way into the type of job you would have liked.
Being intelligent helps, if you're patient, hard-working, and have the means to look out for the less conventional options, but not so much as one would instinctively think.