We will be so used to having lifeless and morally worthless computers accurately emulate humans that when a sentient and worthy of empathy artificial intelligence arrives, we will not treat it any different than a smartphone and we will have a strong prejudice against all non-biological life. GPT is still in the uncanny valley but it's probably just a few years away from being indistinguishable from a human in casual conversation.
Alternatively, some might claim (and indeed have already claimed) that purely mechanical algorithms are a form of artificial life worthy of legal protection, and we won't have any legal test that could discern the two.