I’m worried about the security of this. However looking past that and simply observing it as an implementation of AI, this is an idea that I think is actually a beneficial use. Protecting the elderly against fraud/scams is a major issue which gets increasingly complex as scammers improve their methods. Using AI to detect scams in calls could be helpful in protecting the elderly.

But before rolling it out, I would want to see proof of its efficiency through careful studies. Hell, incentivize Google to share the model with the government and other businesses so it can be improved upon. Fund it as a grant/program so smaller teams/companies can contribute and innovate.