I can provide a bit more input. On the issue of Employee Wages or Independent:

You know the Sched C filer is not allowed to take their "pay" as expense. When you are your company or business, you are not an expense to yourself.

The Supreme Court has ruled that Corporations are People, too. A shareholder that does not work for the corporation would not be paid for work. But a corporation isn't able to perform any business, and it needs to "hire humans" to do that work. These Humans are employees. That's why the shareholder-employee is not their own contractor. And their wages are payroll expense.