Often this deeper analysis is done on children and the 15 minute thing a quick initial screener :)
I had a bunch of assessment in early childhood but I didn't figure out what exactly my set of issues were until I got assessed by a very good neuropsych later in life. I really wish I knew about this stuff in late childhood, would've explained a lot more! It's also sad that there are not many good neuropsychs out there and it's hard to evaluate who is good for most people.
One thing for the other intelligent people out there, your intelligence can often mask that you are not performing to your full potential, because it compensates and makes you perform 'good enough'. Unfortunately our medical system is more orientated towards fixing the people who's lives are in a mess vs people who are just OK, so those who hobble along often don't get the help they need. Sometimes wish there was an equivalent of doctor that focuses on making people perform their best vs. good enough sometimes, kind of like a coach.