IMO, the risk of a hardware backdoor is always there and perhaps less damaging if the country is across the world, depending on the threat model and damage model.

realistically you're right, and I probably would deeply consider my options before thinking about it. But we can go down the list of lower and lower firmware that we cant verify (hell, I just reread Reflections on Trusting Trust this morning). Every device has Chinese-made chips. I suppose it's more risky than an American company but to me it seems like rearranging chairs on a sinking ship, which is why I never keep anything sensitive on my phone.