If it produces a sound (and therefore, by definition, a logically valid) argument, that is about as good as we could hope for. What we want to avoid is the fall

If it produces a sound (and therefore, by definition, a logically valid) argument, that is about as good as we could hope for. What we want to avoid is the fallacy of assuming that all arguments with true conclusions are sound. Another thing we want to see in an extended discussion on a particular topic are a consistent set of premises across all arguments.