Edit: Maybe you're unaware of the term https://www.lawinsider.com/dictionary/sole-contractor, I was talking about a single person consulting, not a contract developer or whatever
Again, I’m talking about consulting, not contracting. Those are different. If you don’t know the difference then here’s a definition of a consultant https://www.lawinsider.com/dictionary/consultant
Now, to a layman, these may look identical. To a consultant, these are vastly different things.
You are not paid on output, you are paid on outcome.
Example: I can spend 10 days consulting a startup board on how to do something and make $50,000.
I can spend 10 days coding for client X and make $5,000 tops as a contractor.