I don’t buy knock off cables no matter what country they come from. Why? First high end cables performance is based on more than what is visibly obvious… for instance cloth sheath and copper colored wire… the exact composition of the conductors, they can be shielded or cryogenically treated, etc… so performance is extremely unlikely to match the real thing. Even if it does, how do you know? Buy a real one and compare performance?
High technology everywhere is about success through constant innovation. No company can create a good product and sell it for ever. Someone will quickly figure out how to match the performance by some other way or the same way. You can have a huge legal department or a huge Research and Development department. The only protection is the R&D. Although Apple is really good at both.
As I mentioned, I have spent my career around the world in the design, manufacturing and logistics facilities of the phones, tablets, PCs, DACs and cars you guys use. Innovation is the key and it is in your own best interest to buy from the original companies creating great products.