who insist that certain commonly and successfully used design patterns have no place in the world.

I don't think the architecture skeptics claim as much. I believe you're restating the claim in a more extreme way that it's commonly expressed, thus making it clearly indefensible.

The claim isn't that certain architecture patterns have no place in the world. Rather, the claim is that those patterns aren't a good fit for most Rails apps.

Pretty much any pattern (that's not a commonly-accepted antipattern) has some good use case, somewhere.