Earlier quoted context omitted.
Which, for someone who can establish a good relationship with a good publisher, is a perfectly reasonable position to take. Publishers are like any other service. If they provide good value, authors should use use them and otherwise not use them.
On the other, other hand, editing, etc., is a one time cost. And, as far as I can tell, Publishers, however, take their share per-copy. And, IIRC, the final profits are divided about 50/50 between author and publisher. Charlie may be leaving a significant chunk of money on the table, given his popularity. I wonder how much more work it would be to get a good relationship with a single priced editing service over a tr…
But I don't know how the relative economics work for an established author like Charlie. Empirically, most known authors seem content to stay with publishers so I'm guessing it makes economic sense for them. But I don't really know.