This appears to be confusing patent inventors with patent owners. It’s the latter who benefit and presumably are accountable for the use of the patent and potential plagiarism.
I’m very much for not allowing trivial patents, but that’s independent from whether the invention was made by AI or by a human. The nature of the inventor should be immaterial for assessing the (non-)triviality of an invention.
You’d have to provide a convincing argument why that would be the case. You probably think it’s obvious, but it’s not at all obvious to me, and even assuming for the sake of discussion that it is true today, it might stop being true next year.
If we want to attribute non-humans inventor status at all (otherwise the discussion about AI is moot anyway), the assessment should be based on the merits of the invention, not on the nature of the inventor.