Note that nothing about your parent comment argued that AI systems will become sentient or become beings we should morally consider people. Your parent comment

Note that nothing about your parent comment argued that AI systems will become sentient or become beings we should morally consider people. Your parent comment simply said they'll get to a point (and arguably are already at a point) where they can be treated as people; human-like enough for humans to develop strong feelings about them and emotional connections to them.