Caveat Emptor and GIGO (Garbage In - Garbage Out)
Yes, the above is kind of true on both fronts. While humorous, the truth is anything but...
The AIs created from Large Language Model (LLMs) like ChatGPT, DeepMind (now Gemini), and others, aren't perfect and are full of biases, and misunderstandings. And they often answer prompts with data that comes across with confidence, but is just plain wrong. Plus, they are biased by texts that are largely in English (primarily American English), and written by native speakers/writers.
Is it any wonder that many AI Checkers and Detection products which are AI-driven with LLMs themselves are having a lot of errors and inaccuracies?