QA is focused on testing a product or system against how it should work. Security analysis tests against how it shouldn't. The second of those is a much larger search space. Both are important.

The argument around blame shifting is apt. The same case has been made for the usage of the term 'bug' (aka an externality). It's 2024, we don't have moths crawling into relays on our computers. We have implementation faults, invalid designs, unsound architecture, inaccurate documentation, ambiguous requirements, and a myriad of other ways to express how software may be defective.

Using those terms hurts, and may even invoke some level of concern from those outside of the engineering org - this is a great reason to embrace them.