Doing business with the enemy always comes with a risk. For countries that don't build their own networking equipment (including the PCBs and chips), you have to accept some level of risk or you have to avoid such technology all together.

Imagine an enemy country using zero-days to track a military leader via their personal device(s), then disabling their smart civilian vehicle they use to commute to work. Final leg is they had previously parked drones along their expected commute routes for just such an occasion and..

edit: see interesting hypothetical future war series on YT, specifically this bit.. https://youtu.be/drr7mmibt9E?t=157

Same goes obviously for ie Chinese stuff, but I don't think you guys realize how for outsider the border between China and US in terms of morality is practically non-existent now. I don't mean it in any snarky way, just looking at facts.

Also, China doesn't invade countries half around the world and bring them to utter destruction and misery for generations to come, killing thousands to millions of civilians and creating breeding grounds for things like ISIS. They do their own thing, quietly and patiently, with laser focus and for outsiders its at most 'not great not terrible' category.