The red herring argument you're making here is your own. You were saying because ideas are here therefore humans must have been capable of creating them. There is no evidence of that other than saying because it's here therefore it had to come from a source of your own presupposing.
If you do not know where the original ideas came from or how they originated it is impossible to determine if AI is capable of doing the same thing. Even accepting the premise that humans did originate these ideas, there zero evidence that they did it spontaneously with no inputs. So with that premise in hand if AI is provided the same inputs it is likely they would produce the same outputs. Considering whatever those inputs where is completely unknown and unknowable at this point All of it is conjecture except for the fact that humans are effectively not creating net new ideas therefore there should be no expectation that AI is able to do that either.
If you do not know where the original ideas came from or how they originated it is impossible to determine if AI is capable of doing the same thing. Even accepting the premise that humans did originate these ideas, there zero evidence that they did it spontaneously with no inputs. So with that premise in hand if AI is provided the same inputs it is likely they would produce the same outputs. Considering whatever those inputs where is completely unknown and unknowable at this point All of it is conjecture except for the fact that humans are effectively not creating net new ideas therefore there should be no expectation that AI is able to do that either.