I know many intelligent Protestant and am alarmed at your lack of charity. Also I would never disdain the simple faith of anyone, Catholic or Protestant.
The fact that Catholic Theology is beyond some does not mean they are stupid.
Perhaps I didn’t express myself accurately. A Josef Ratzinger (Pope Benedict XVIth) versus a Charles Stanley would be a laughable comparison. Fill in the blank with any protestant of your choice.
Don’t be alarmed.
Furthermore, most people of limited intellect leave the Catholic church because they can’t understand things. It’s true. It’s much easier to walk down an aisle and declare one’s love for Jesus and get eternal salvation. Simple, non-intellectual, non-thinking. Maybe that’s why God created Martin Luther.