I wonder if "we won't use it for anything else" is really any less credible than other vendors who simply aren't talking about any scanning they may or may not

I wonder if "we won't use it for anything else" is really any less credible than other vendors who simply aren't talking about any scanning they may or may not be doing. We know TV makers scan what you watch, even from other inputs, for ad targeting. This sort of capability is already widespread and basically a commodity - who else is using it that hasn't told us? And can we do anything about it short of only using hardware and services where trusted parties have verified the source?