> We realize test driven development doesn't work, right?

What do you mean with this? I'm a software engineer, and I use TDD quite often. Very often I write tests after coding features. But I see a huge value coming from tests.

Do you mean that they can't guarantee bug free code? I believe everyone knows that. Like washing your hands: it won't work, in the sense you will still get sick. But less. So I'd say it does work.