I couldn't elaborate a complete response to this opinion, as it has a number of misconceptions and wrong statements.
Can I start with the painters and sculptors which work were accomplished with the aid of assistants as Rafael, Caravaggio, Michelangelo, da Vinci, Rodin, etc, in different scales. Painting is not photography, totally unrelated, other medium, other skills needed, other "technology".
But let's for the moment consider this option: photographers that I can recall starts with Cartier-Bresson for instance, I could add a list of Magnum agency photog. who had their print done by others in house. I have worked for a number of big scale newspapers which had also their own lab. and none of their photographers had to make this work neither had the time to. In color processing? You name it, for different reasons.
It doesn't hurt to the artist to humbly consider the help of great printers to accomplish their work, for one reason or another, neither it restricts the value of the image taken, IMO. It's a wrong idea I think to consider the help of a professional lab a gap of any sort toward the results of an image. Even A.A. did it, at his own lab,
Cheers,
Renato