Medications have an effect because they are drugs and drugs work. I wouldn't read much into it beyond that. Every person will have to decide if the overall results are worth whatever cost/benefit.

The idea that the drugs "cure" or "treat" is just a social construct to justify their usage.

From first hand experience, it doesn't take much to get an ADHD diagnosis, as long as you seem credible and not drug seeking. I could ask my psychiatrist for practically any drug I wanted. It does not seem like a viable long term solution for me.