Also, let's not forget that, for voice assistants, the tech industry largely poisoned its own well; it doesn't matter if they're actually any good if a growing number of people simply don't want your always-on microphone in their vicinity, because you have repeatedly betrayed their trust.
That's why it doesn't matter if, say, Facebook actually spies on you via the microphone in your device. Enough apps tried it that it has left the average user wary, especially once it became apparent that pretty much every voice assistant had those teams of underpaid humans in faraway countries, listening.