I see your point but have this concern that a silicon based 'life' may not see the value in us carbon based life forms. Hopefully they will see value in plants and animals. Unless they become cyborgs and have a vested need for biological components, would they cease to be concerned about its value? When I see a rusting piece of metal, do I have a sense of concern to help restore it to its previous luster? Perhaps if I need to use it for a craft project. Otherwise, not really. Would a silicon and metal being be motivated or have an algorithmic concern to attend to sickly organic life forms? I do see that there are benefits that ai and robotics offer, but children? If they did become sentient, that does complicate the question. Good post, makes one think.