Generally speaking, simple UI sounds like something to aim for. If your UI is "intrinsically difficult", there's a high risk the user will conclude the same thing.
Not intrinsically difficult to use, I mean that the problems involved in implementing some ui concept may be intrinsically difficult or not (this can happen even when from the user's perspective the UI is simple/elegant). When they are, then you need appropriate tools.
And yes absolutely as I’ve said, if it’s possible to for some domain to have a basic ui do that.
And yes absolutely as I’ve said, if it’s possible to for some domain to have a basic ui do that.