Fair. I kind of assumed that is was obvious that those who succeed in developing superior products and services attract more customers, do more business, and thus acquire more value to reinvest and grow than those who do not. Am I missing something?

Can also succeed by effectively targeting vulnerable consumers, deploying deceptive marketing tactics, lobbying for favorable laws for your company, or purposefully ignoring the law successfully. Or monopolize and milk a basic need like medicine for common disease. Or run sweatshops to minimize cost at expense of everything else. Sell weapons to regimes known for their human rights abuses. Secure a license to take up finite resources without regard for sustainability or at underprice. Manage to externalize costs for necessary environmental protection. I would claim it is easier to make money the more of such bad things you are willing to do.

Also, a bunch of people have good access to capital just because who luck chose as their parents.

Well I’d argue that the purpose of capital is to produce more of itself, not to develop superior products/services. Capital is a quantification of power, and if your sole purpose is to accumulate more of it, human history is a string of examples of how this comes with significant misery for the most.