You'd end up with GarageBand. It all depends on the target audience. If you have a piece of software meant to be used by experts, it should be powerful enough that it doesn't restrict them.
I disagree that software has a tendency to dumb everything down to the lowest common denominator, simplifying and automating things is the purpose of software in the first place, but there's a huge amount of software out there that is as powerful as it needs to be. To name a few examples: Blender, DaVinci Resolve, almost everything Adobe makes, and JetBrain's IDEs.