Just because Ferrari might be capable of making that car for $20k, I don't have a fundamental right to demand it from them any more than I have a fundamental right to demand that you make me a sandwich right now for $5.
> they can afford
Before using the word "they" in a prescriptive sentence, think about whether you could substitute "I" and you would still be happy with it.
I have no issue selling into a competitive market, that’s just how things work for individuals. It’s only at the scale of countries and giant companies that the ability for anti competitive behavior really shows up.
What about all other stuff? i.e. maybe you or somebody else can "afford" to sell their labour at 10-80% of what they are paid?
That a competitive market drives prices to zero economic profit is a fairly basic result; no active measures besides the existence of competition are necessary for this.
> What about all other stuff?
Yes, this applies in all competitive markets. If it doesn't apply in a market, there is a constraint on competition causing it.
Yes and that's not necessarily a good thing in all markets. Very low profit margins can result in less innovations and would certainly discourage companies from taking risks (basically by definition)