No, it really wouldn't. Many, many, many craftsmen try to produce consistent, even products by hand. Every single time, when they don't use a jig and measure a hundred times over, it comes out far, far less even than modern machines.

In addition, I seriously doubt horse hairs/etc would across hundreds of them all be perfectly straight and consistent to the point where the binding pattern would be clearly visible at the tips. Even if they were, I'd bet crafting it by hand would disturb them enough to floof it out a bit by the end of production.

In either case, it's very silly to make something look so obviously modern, even if it were possible to make back then. They're selling an image, and this image screams "modern production".