Retouchers provide the final touches to an image to create the best they can be. 70%-80% of the quality depends on the photo; therefore ends at the photographer except for cases that require compositing. I regularly get cases that I tell my client not to spend extra money on me because the photo quality isn't good enough to receive satisfactory results. It will be a waste of resources.

When I moved to my current residence, I threw away my old Photoshop & retouching books as they had become redundant. Finally, at Covidvirus lockdown on the weekend, I went through my library and decided to get rid of most of the books that helped me in my profession.