No you don't sound paranoid. I build this app for a personal need initially and also due to privacy concerns. I am too busy and unfortunately health conditions of my son required multiple appointments every week since he was born.

I explored alternative such Virtual Assistants (there are many you can google for them) but I wasn't comfortable with having my data shared with another Human and they make the call on my behalf. You can control server, machine to delete data but you can't know what another human is doing with your data no matter what the company does. Also they were very expensive