waybull

That depends entirely on how you do it.

If you're upset that there's lousy test coverage, and you respond by complaining, that's not useful. If you respond by making the test suite run faster; creating better mocks; writing docs; making the test results more visible; teaching others how to write (better) tests... that's a different story.

The trouble comes when you think that pointing to a problem is, in and of itself, valuable. We're all surrounded by problems; pointing out one that we likely know about probably isn't useful.