All that to basically say income and job descriptions do not inherently say anything about what disorders a person may or may not be suffering from.
A lot of mental illnesses go unnoticed by others because they're often very easy to hide (and you're encouraged to hide them). Thinking that you can't be in the top 5% of earners and are just doing "speed for fun" is like thinking you can't be suicidally depressed just because you are a comedian. Hell, most people were surprised by Anthony Bourdain despite him being open about his depression. What you see is not reality, so don't be quick to judge. You'd be surprised how many peoples mental states are a house of cards but look like they're living in the finest of mansions.
Seriously, comments like the GPs are not only bad takes, but actively harmful. It perpetuates the belief that people should hide rather than seek help. The big issue with mental illnesses is that they are typically extreme versions of normal behavior and we often paint them as unrealistically extreme and constant. They're highly variable and the most common thing to happen is people only seek help when they're in the spiraling states, where they are incapable of getting that help, but will not seek it out when they've normalized.
Plus, you don't know if they're in that top 5% post medication and would not have been prior. You don't have the counterfactual power to make such judgements.
I don't know if I have ADHD, but I've always been terrible at getting out of bed.
It bugged me so much I ended up building an app[0] to force me to get up. If I didn't get up and scan my toothpaste barcode within a few mins of my alarm, I'd have to pay $10.
It also has cheat detection so I can't just turn off the phone to avoid getting up. Alarms are stored in the cloud and lock 1 hour before going off so they can't be changed.
Many of my users tell me they have ADHD so it seems likely I fall somewhere on the spectrum.
[0] Nuj Alarm Clock - https://nuj.app
Surviving only because you've structured your life to revolve around the limitations of your disorder isn't a sign that everything is fine.
Adderall and its contemporaries aren't speed and I promise you it isn't fun. Stimulant medications are miserable to be on, it's just that not being on them is worse. That one time you took high-dose adderall in college is not at all reflective of what the experience is like.
Is that person just having fun on speed in your view?
Anyone that dismisses this as being a scatterbrained person that likes to do speed is clearly not trying to help anyone and are only here to tear them down and make them hate themselves more than they already do. The world would be a better place if trash like you was collected and disposed of. Grow up, asshole.