This would be a good bill. Devices like Alexa should never transmit conversations back to Amazon's servers but all processing should be done locally. They should learn to train their system without real user data.
[1] in the "informed consent" sense, not the usual open ended "you agreed to give us whatever we want in our contract of adhesion" dark pattern.
In other cases those personal assistants could first ask permission to query an API or search engine.
That's a non-trivial modification, even before talking about the processor upgrades required to actually utilize that information and do local processing.
Your suggestion would drive the cost of an Echo from $30 to $300.
(The best counterargument I can think of is that the speech recognizer might be too computationally expensive to run on cheap hardware.)