Your confusing reasonably trained in a narrow area with intelligence.
How do you define intelligence?
"A very general mental capability that, among other things, involves the ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly and learn from experience. It is not merely book learning, a narrow academic skill, or test-taking smarts. Rather, it reflects a broader and deeper capability for comprehending our surroundings—"catching on," "making sense" of things, or "figuring out" what to do"
Lets examine the parameters. In order to start a new business one has to be able to cover startup costs and live on your savings. Lets look at average savings as a starting point.
https://www.zippia.com/advice/american-savings-statistics/ About 33% have 10,000+ and 42% have less than 1000.
Even 10k is really very little in truth just a little runway until you can either acquire additional funding or crash and burn.
Lets inject some reality. Half of America has basically nothing. Another 25% would have to sink the majority of their accumulated wealth eg home equity into such an endeavor with a 50 50 chance of existing in 5 years. They COULD do it but it would be both scary and dangerous and half of them would end up ruined. It's like saying I could climb Everest.
I could scrape up the funds for the plane ticket and its possible I might survive the trip but anyone saying "most people could climb Everest" would be talking nonsense.
There are plenty of ways to start a business without instantly giving up other employment.
-some ramble about how it’s all too hard
Excellent debating style right there!
Increasing costs and inequality rob us of the future surpluses that would be produced by such endeavors. Should we want to enrich our society it isn't sufficient to pretend opportunity exists we just endeavor to actually support it.
The rest of your response is similar to your previous rambles about how it's all too hard, despite the countless examples, a mere google search away, of people who have started and run businesses in Western countries without instantly starving to death, or whatever your mostly-bullshit argument is.
This or worse is about half the country
You need expertise, time, and money to start a business. The majority of people lack not one but all 3.
This is probably why only 9% own an established business. Indeed jp Morgan says that future business owners on average start out substantially wealthier.
https://www.jpmorganchase.com/institute/research/small-busin...
Which supports my assertion that the majority are ill positioned to start a business.
Money buys time, money buys relevant expertise in, wealth makes risk tenable because failure doesn't mean homelessness, money and financial health in fact buys access to borrowed money.
Everyone could just do what only 9% of people do is an incredibly privileged thing to say it's like Zuckerberg saying anyone can have a website or bolt saying anyone can run.
It's insulting.
I guess some elements of capitalism need people with your defeatist outlook, to be lifelong wage slaves.
There are a lot of as you put it "wage slave" businesses which have 45 people making barely enough to live 4 folks making 20% more in semi-supervisory positions working 60 hours a week with lots of unpaid overtime effectively making less per hour than the grunts and 1 guy making a decent living.
You can accurately say that any of the guys could in theory move up but the logic breaks down trying to apply it to the group as a whole with one position essentially worth having anyone COULD move up but EVERYONE never could.
Society is essentially so constructed in the large. We can't all sell each other financial products. If we want society to function we will have to have a whole lot of people who are modestly compensated and I don't just mean french fry cooks. There are a lot of positions that are both challenging and necessary that really aren't paid that much. These people aren't all stupid losers and they aren't all too stupid to be business tycoons. They fit into the slots that society made and if we want people to move up we ought to do a better job at creating such slots and allocating resources to them.
Bemoaning the fact that people haven't pulled themselves up by their bootstraps is basically useless.
What business did you start?
You simply don’t get to put all your focus on making your business succeed without being a bit “blinkered”. That’s what focus means.
Once someone gets to Bill Gates level intelligence, I would agree any additional steps beyond that probably negatively correlates with grit and 'a certain irrational headstrongness' to a sizable amount, so much so that it noticeably reduces chances of business success.