If you can buy a finished product that is reliable, it doesn’t matter where it was made. But if you are trying to build the reliable product, it’s like telling a custom house builder how to precisely build your house, but you are never able to physically go to the job site. And that job site is in a foreign country, but you want it built in your local style that is unfamiliar to the builders. It can be done - and effectively - it’s just a lot more difficult.