Comment by p1necone

It seems fundamentally obvious to me that this line of thinking is bogus. If you move enough of the complexity to UML diagrams of course the code will be simpler - because all the complexity is now in the UML diagrams.

That doesn't make the complexity go away, you have to do just as much work writing UML diagrams as you did writing code before, but now you're expressing your complexity in cumbersome visual designers rather than code.

If you're going to shift business logic/data from code to any other format you need to demonstrate that that other format is somehow better for representing that information, you can't just pretend that because it's not expressed in code any more you've gotten rid of it.