Yep, handmade probably does not mean "custom" or "bespoke" in this case, which means limiting the options presumably allows them to take advantage of economies of scale to lower the price compared to other options for handmade shoes.

I've never used the product from Markhors, it was just one example I was using for my point previously. I'm more the type of guy that either wears cheap sneakers or actual bespoke shoes, not much in-between.