I really like these types of discussions bc it forces me inward to evaluate my own shopping preferences and expectations. It seems that much of the disappointment related to wonky stitching, loose seems, and overall sloppiness stems from the buyer's expectation. Hype raises expectations. For some people, the expectation of a $2000+ jacket is that it will be perfectly executed. For others, the value of the jacket is reflected in the unique hide, cut, design, or exclusivity (or some combination) - not whether the jacket was laser stitched as if done by a machine on an assembly line. I don't presume to say one expectation is better than the other. It's just fascinating to read about what influences each of us when we make purchasing decisions.
I think you may have expressed a fallacy of bifurcation here - it has to be X or Y.
Actually there are other options. Artisanal high craft jackets are intended to show off a maker's skill. Sure, there can be imperfections, but not incompetencies. When a basic artisanal skill, like stitching, is very crooked or fails in places, this is no longer a celebration of imperfection, it is a competency issue. I don't think 100 perfection is ever on the table for any jacket but some mistakes are just screw ups and a failure in craftsmanship. What happens next is what level of screw up you are willing to accept. But I wouldn't minimise a mistake in a significant core skill by saying it is an imperfection.