Education: In high school I was, above-average performer academically, but not top-tier by a long shot. And we're talking in a rural and relatively low-income county in northern Pennsylvania, the bar was not very high. I went to an average Catholic college (60-65% acceptance rate) studying accounting, and an accelerated MBA program.
I studied more than most in my high school, and only got above average results. I've never taken an IQ test, but imagine I'm not too much better than average. I kept up those habits in college, and buckled in to move through the CPA exams. It wasn't talent or natural ability, trust me.
Career: Went to work in internal auditing for a publicly traded bank, earned my CPA license, moved into the finance function, was promoted to Chief Accounting Officer, and that's where we sit now. Youngest individual with an officer title in the company by quite a few years.
My point was more along the lines of controlling the variables you can control, primarily time. If I only studied or worked a "normal" amount, I wouldn't have amounted too much. Proper time management was really the connection I was trying to draw to the original post in this thread, how all of the examples of "successful guys" probably have strong time management and willpower to get to the positions described.
I think if the "average" guy optimized their time properly (properly not perfectly, burnout is never productive), avoiding TV/movies, no mindless scrolling, no video games, wasting away drinking too often, etc..... and applied that time to career, health, and intellectual growth, that after a few years, they'd no longer be "average".
Correct that not everyone can generate the top-tier results, or even top-tier effort, but everyone can give MORE effort, and that counts for something.