You draw distinctions that use idiosyncratic definitions of some fairly standard terms. For example, Chicago defines the terms “manuscript editing,” “line editing,” and “copyediting” as synonymous with each other, and none of them as synonymous with “mechanical editing,” although that is one element of them. Certainly, I agree that an author has a right to expect more than merely mechanical editing unless that is specifically what they have requested. However, I cannot agree that the only route into competent and appropriate freelance editing is internal employment within a publishing house, and that the only clients who should be counted as a relevant part of a freelance editor’s curriculum vitae are those who are traditionally published.
I’m sorry you feel that way about my participation in the discussion and defending editors of similar background to myself from what I considered unwarranted disparagement. Perhaps the only approach that would have 100% proof against accusations of “trolling” would have been to allow the claims to stand unchallenged, but that did not seem fair to people who come here to get useful information.
So because of this and because I don’t live in NYC or LA, I decided I may have better luck writing a book, which I have been doing for several months now and enjoy; however, I know it needs work and I can’t go back to the 5th grade and pay better attention to the simple “put your period here and comma there” lessons so I was hoping to learn as I go with reading, writing and seeing my finished product after hiring an editor.