From a client point of view, I will be much confident to contract any software provider if they can guarantee
their software privacy and data security.

Since I do protect my App Idea and much careful about exposing it, I won't be happy knowing that all my app users' information are shared on a public cloud.

This applies to my end-users also, if I can state that "Yes, my app is highly secured and all my users' data are encrypted" they will have more confident using my app.

I did some research and read some "Privacy terms" of public cloud providers, none of them guarantee the data privacy!

It would be a great advantage to demonstrate that you provide a secured app, and all you share in public clouds is a "encrypted bunch of bytes"