Exactly. Not many 26 yr olds are an expert on *anything*.
not today. few hundred years ago, there were many.
I would like to mention one field. Computers.
This is totally wrong. Many 26 year olds are well into their careers by then and have garnered a wealth of experience. A perfect example can be found in the porn industry. (sorry, I felt compelled to go there.)
Think again! Some are indeed very much experts.
"At 4:17 on the afternoon of July 20, 1969, the average age of the men listening anxiously in mission control as Neil Armstrong fought to land the lunar module before running out of fuel was just 26 years old. Kranz has described himself as the old guy in the room. He was 35 that day."
http://amyshirateitel.com/2012/08/11/apollos-youthful-glow/
Many of the brightest men at NASA were in fact in their mid twenties working together to put man on the moon.
I don't know the guys name but the head of the project to develop the F1 engine to launch the Saturn five to the moon was given the job in his mid twenties. He and many others saw it through and developed the most powerful rocket engine the world has ever seen.
Pretty amazing