I agree with everything you said, but I we shouldn't deny that opportunistic bad actors don't exist. Or it might get on their radar and be exploited. Open source tools also tend to be better maintained, documented and reliable, so the bad guys will have a better tool.

That being said, bringing it to light also has benefits like you said. If the tool is out in the open and state of the art techniques are used, technology to detect its use will also benefit.