Many, many people who meet your criteria in fact are severely lacking in executive function.
Neurological conditions aside, surely you understand that an adult who's developing years formed a healthy "reward system" for accomplishing tasks will have a much easier time getting things done.
While, yes, most of us have the ability to correct past habits and develop discipline ... It's no different than an athlete who began training at an early age versus someone who took up a sport later in life. The difference in skill and ability is predictably and consistently stark.
These days I don't, it's not about discomfort, I need something more human and wise behind my efforts.
I'm sure most parents know that, I've seen some that were demotivated, but when their family started, they were moving everything around.
A balance sense of purpose is worth a lot there.
ps: a distraction heavy context is also bad. ironic :)
A lot of successful entrepreneurs had no safety net, and have been through significant adversity.
Those that have been coddled and never held accountable have worse coping mechanisms and drive than those who have dealt with it and overcome obstacles the majority of their lives.
I am pretty sure my main reason for procrastination is the fact that I never learned to endure suffering/discomfort while growing up.
I grew up very sheltered and I was never forced to do anything which I did not like (bring out the trash, clean up the room, talk to people, ...). It was kinda nice growing up like this but when you turn 18 and have to enter the real world you realize you miss all the coping mechanisms which you need to do uncomfortable stuff.