Yes, all of those things are classic ADHD... But they barely even scratch the surface. That's just the "haha" relatable stuff. Time management issues are real.
ADHD is, in essence, making a list of all the things you need to get done, placing the list in all areas you frequent as visible as possible, and then wondering how 16 hours went by and you're still on item #1 but now you know a whole lot about lizards that you didn't before.
ADHD is also the reason you can get work done for 16 hours straight without distractions.
The overdiagnosing of ADHD is only making things worse because it prevents some people from understanding when they need to make real lifestyle adjustments... both people who hide behind the diagnosis and people who refuse to take it seriously.
In today's world of hyper-distraction this is becoming all the more pertinent. ADHD can affect people of all walks of life and level of intellect, and it can be paralyzing as an adult with the amount of sensory information present in today's society. And we still aren't even sure what environmental factors if any can cause ADHD... for all we know modern society is contributing.
> ...even short-term engagement with an extensively hyperlinked online environment (i.e., online shopping for 15 minutes) reduces attentional scope for a sustained duration after coming offline, whereas reading a magazine does not produce these deficits
Overdiagnosis is real -- being a developmental disorder, ADHD people present age-inappropriate behavior -- "you're too old for this." A lot of people simply grow out of it (although, the ADHD brain typically reaches maturity around the age of 35, so, it can take a while). But many people never grow out of it, so underdiagnosis of ADULT ADHD is real.
In most countries, however, underdiagnosis is the real issue in most countries. I'm in the Netherlands and I went to a school for special children and talked to half a dozen therapists over ten years, and not one of them even considered it, while it's one of the most common disabilities, and considered one of the easiest to treat. I went to my GP and she had no idea about it, I basically had to explain the diagnostic criteria to her myself. It's possible I've just been really unlucky with the last 10 professionals I went to, but I think it's representative of the attitude in Europe -- especially the farther you go south and east.