While the origin of production might not be generally of concern to the buyer, there are several issues for smaller projects like these that make overseas production very frustrating. Ncase was successful in this aspect because Wahaha360 went to Asia more than a few times, has experience with manufacturing and this sort of stuff. While Asia is excellent for production, you do need to supervise and manage it there as well to get the quality you want. Let's also not forget prototyping (plus shipping) by Lian-Li isn't cheap !
There were also some issues with shipping, with more than a few people getting different cases (panel configurations) than the ones they ordered because a postal worker went... postal. So I can certainly see why Kimera wants to keep this close to home so they can guarantee quality and I'm not sure moving overseas would allow the same quality for the same price.
In the end, the cases for the US would become more expensive to ship, while those for Europe would become cheaper. Necere also recently mentioned that they offset the shipping costs by moving some of the cost towards the case's price. So the Ncase M1 which costed 205$ with 40$ shipping could just as well have costed 160$ with 85$ shipping, as an example. It was an excellent idea, because people didn't have a problem with the 200$ price target that was set earlier, but they would have thrown a fit if it was 160$ with 40$ more expensive shipping.
I'm also a fan of keeping people in the US and EU employed for production like this, so I'm not a fan of overseas production just so the shipping price (for me as a European) is lower.