@Writing Again:
A very reasonable argument. The angle you're describing sounds to me like "well, there are only so many hours in a day and cents in a buck; sometimes we can't cover every single base, so focus on the bases that matter."
If so, then i agree in general. Probably the devil is in the details; i.e. haggling over which individual books suffered more than others as far as constraints of time and energy.
[lost in thought] It's daunting, to think that a good vision could be warped by logistics. Especially knowing that i'm certainly not the only critical reader out there.
* * *
When a book "works" for me, it paints a portrait of something i want to look at. The more it "works", is the more i want to look at it. The more i look, is the more detail i'm going to notice in it. Say the portrait is all about a lovely lady; if it's "working", i'm going to want to get to know her.
Well, in the process of being all zoomed-in, i'll inevitably notice something like, oh, she's wearing a hairstyle that subtly doesn't fit the period of the scene. My reaction depends a bit on how critical her head is to the portrait: if it's a huge panorama and she's only half of it, i'm not as troubled as if it's a closeup.
Either way, though, my argument is that the author should be able to paint the picture, realize his vision, but still be held accountable for something like an inappropriate hairstyle.
My argument is also that the author should be aware of the difference between an anachronism versus, say, the choice of eye colour. The former is arguably a flaw, the latter is just a matter of opinion. Sure, wave aside quibbles about "well, her dress needs another rose on it", but listen to complaints like "nice picture, but one part is unlikely for that era".
Now, the casual reader will just be happy that they're seeing such a lovely lady in their head. They'll thank the author/painter, and close the book in contentment.
Wheras the reader who knows better will be irritated, maybe even disappointed that such a lovely lady wasn't fleshed out correctly. It's not a lethal blow, it's an itch... like the car seat that just doesn't feel right no matter how you adjust it. Or the jeans that pinch on one spot and gap in another.
Some say, it doesn't matter: as long as the author is happy, as long as the editor approves, as long as people buy the book, as long as the lady is lovely, it doesn't matter if she has a subtle bug/feature/flaw/itch that makes readers go "heh, now i wanna fact-check this bozo."
Well, if i subscribed to that, i'd be annoyed with myself. Is it unreasonable for the author to round off all the corners and cover all the bases, so that he reaches both the casual and critical readers?