This is coming from someone with a prescription for Concerta 36mg (pretty much Adderall without the bad side effects) just for reference.
Adderall and drugs like it are legitimate drugs that are probably over-prescribed and thus abused. Teens use it as a means to increase their focus. I've even heard of kids doing some crazy shit like snorting it, injecting it intravenously, etc just to get high. It's a serious problem, but then again, so is practically every prescription drug. If it has the potential to be abused, it more than likely will be abused. There should be a more intense screening process/diagnosis criteria though. I literally walked into my doctor's office, told him I couldn't focus and was having trouble with impulsiveness and he basically threw ADHD medicine at me. I do believe I have ADHD, but that's not the point. Practically anyone can get their hands on these drugs if they want to.
These medicines are also highly addictive which is a huge concern imo. I only take my medicine when I feel like I actually need it because of this. Not in the same way kids who don't have focusing problems do though. They will take it just before a test or while studying for a test thinking that if they're more focused they will be more likely to succeed, when really that isn't how it works. I take the medicine and it calms my mind down to a point where I can focus on a singular thing (honestly, it almost zombie-fies me sometimes.. it becomes much harder to express emotion). For someone without ADHD it will just act as a stimulant.