Privacy

Yes, I know it will help prevent it. I've seen it happen in real time. You have time to think if it sounds suspicious after you get off a phone. You have time to decide to call your bank and ask. A lot of times scammers will pretend it's to help a family member in trouble and they need the money immediately, but now the person has time to call others in the family and discover it was all a lie.

You obviously don't know how easy it is to pressure people in the moment, and how much harder it is to do after they aren't under an instant time constraint. Hell, I used to work in sales and I've done it. People do illogical things when they're caught up in the moment. I know 100% this will prevent some people from being scammed.