The root problem is that you can't produce usable XAML without also knowing C# and the .NET Framework. In other words, you have to be a programmer to generate XAML in Blend. Fail.
That's like complaining about gravity or friction or taxes. Give me an example of a software tool that non-programmers can use to generate working software and I'll eat my hat.
> Give me an example of a software tool that non-programmers can use to generate working software
XAML isn't working software. It's markup. UI.
For an example, I've seen designers generate great HTML+CSS (and then leave the data queries and ajax post to coders who don't have the same design sense).
Designers use tools, and they edit the resulting textual markup by hand. Because understanding that markup and having an aesthetic sense about when it "looks good", has low repetition etc is part of their skillset.
That's like complaining about gravity or friction or taxes. Give me an example of a software tool that non-programmers can use to generate working software and I'll eat my hat.