I can agree that not everyone will find them having human or equal-to-human rights.

But you point out that some factions would give rights to a set either large or smaller than "the set of all already-born humans" (which presumably is your preferred set).

All it takes for us to end up with very empowered and harmful-to-humanity AI is for a bunch of well-meaning people to campaign for its 'rights'.

Fetuses have, as you alluded to, arguably been on a tear lately in that department, and they don't even talk. How persuasive will a future Claude be to convince people to advocate for its 'rights,' if we keep telling it that it's arguably conscious, and that its 'consent,' its 'preferences,' and its emergent beliefs matter?