They might be used as excuses by a complacent industry, but they are not just excuses. They are also valid reasons for concern, and would still be so even if not used as talking points for Detroit lobbyists.
US auto industry is enjoying significant protectionism right now
Regardless of that, China’s government has spent more than a few years subsidizing products and services in order to make their exports dirt cheap abroad, eventually making other nations dependent on them. (See also: the Belt and Road Initiative.) This fits the same pattern, and would still be a problem even if US auto industry protectionism didn’t exist.
US auto industry and especially EVs are horrible with surveillance right now.
Agreed, but once again, that doesn’t invalidate the problem that I mentioned. A foreign adversary having deep, real-time access to the nation’s infrastructure, traffic patterns, sensitive information revealed through conversations and cameras, etc. is a larger problem than the personal privacy issues that already exist domestically.
Chinese surveillance devices aren’t doing anything different from anyone else: they’re all violating our privacy and we have no protection.
The difference lies in where the collected information goes. That might not matter to some people on a personal level, but on a national scale, handing all that info to an adversary nation is cause for concern.