Exactly. The big companies are scared of lawsuits and trying to get approval for something like that would be a nonstarter. As a matter of fact the device folks at the same company would be working hard to kill such an idea in its infancy because it’s already an uphill battle to sell always-listening or always-watching devices to consumers because of the creepiness factor.
And people also are terrible at math. Modern ML (regression & neural nets) are ridiculously good at predicting stuff you might be interested in, particularly when rich data sources like browsing and e-commerce histories are available; the decision to show the ad to you at some point almost certainly was made long before any audio-to-marketing pipeline could act on it.
Neither is a US company. TikTok is on their last appeal to the Supreme Court to avoid being banned in the US. Huawei is banned by the US government for many uses, e.g 5G infrastructure. Neither is a good example.
And people also are terrible at math. Modern ML (regression & neural nets) are ridiculously good at predicting stuff you might be interested in, particularly when rich data sources like browsing and e-commerce histories are available; the decision to show the ad to you at some point almost certainly was made long before any audio-to-marketing pipeline could act on it.