Do you insist on everything being 100% vicuna? Of course not. Don't be obtuse. Hand sewn shoulders are only noticeable on close inspection, and it is not an unreasonable decision, by any means, for someone to choose not to pay a marginal $100 (or whatever it may be) for that feature.
Additionally, preferences on what looks best are subjective. And I've seen plenty of hand stitching on SF that looks like shit. And even more additionally, I don't doubt Carl's view (if I'm interprating it correctly) that machine sewn stitches are more robust.
Even more additionally: I think hand stiching might look nice on a casual shirt, sure. But I think it would look innappropriate on a business shirt in many or most situations.