First: make a prototype. If you can not do it, learn how.
No, really, just a basic minimum viable product. As you said, it should be simple.
If some things are over your head, find someone to do these things for you.
Prototype manufacturing is cheap these days with services like JLCPCB or JLCNC.
Is this just an opinion post or am I missing something?
Apple intelligence does have some useful things, like showing a summary of each mail or message.
But I will not argue here. Nothing is as black and white as you make it sound.