I’ve thought more on this yesterday, and I think my issue is-

I don’t want something that ‘just works’, I want to BUILD something that ‘just works’

The distinction is that I don’t want to buy premade solutions. I want to make them. Not because of the customizability, but because the fun is in the building. Think Lego- hundreds of people build the exact same product in the end, but why are they sold in pieces? Just assemble the damn things and sell them complete (with markup). You think more people wanna buy that?? I’d bet against it.