ardit33, there is NO PROOF whatsoever that these cognitive differences are a result of age and not experience. The brain is plastic; it's shaped directly by experiences.
If you never speak to a child from birth to 4 years old, it will be unable to learn to speak. That part of the brain will simply have not developed. There's no reason to believe that this is not true of all the other skills you mention.
If you had started doing that "supervisory" role 3 years earlier, you would have been great at it by 16. Similarly, most people start doing that sort of thing at 22, so at 22 they are where you were at 16, meaning they were 6 years behind.
If you never speak to a child from birth to 4 years old, it will be unable to learn to speak. That part of the brain will simply have not developed. There's no reason to believe that this is not true of all the other skills you mention.
If you had started doing that "supervisory" role 3 years earlier, you would have been great at it by 16. Similarly, most people start doing that sort of thing at 22, so at 22 they are where you were at 16, meaning they were 6 years behind.