I know what a German soldier of 1941 should look like, but how do I know that the manufacturer does if I can’t see what they are offering? It goes far beyond knowing what a Sherman looks like.
Yup. Not only accuracy of the subject but the quality and so much more that can only be discerned by seeing it.
Not to mention sculpting style and general aesthetic direction. Assumptions can’t be made about which aesthetic a figure or model has been sculpted in, even with historicals.