Natural usually looks better than obviously fake, so it is worth pointing it out if you want quality. It is like how fake round drawn breasts doesn't look as good as more realistically drawn ones, but it is much easier to draw round balls than the more nicer real shapes.

So for these butterfly images they would look a ton better just by not having perfectly angled T-pose wings. Just varying that a bit and never having perfect angles would get you almost the same pictures but looking much more natural.