That largely depends on your point of view

Regarding your other points, they didn't go very far from someone claiming some 50 years ago that now when calculators could calculate faster and with higher accuracy than any human would, the end of humanity was near. Now calculators can calculate orders of magnitude faster and with even higher accuracy and precision than ever before, but did the end become nearer? Further, we basically don't know what being a sentient being means, so all such assumptions and ideas about the Terminator style future are mostly speculations. And while you may have some substance behind your claim that the majority of population don't have enough brains (though this is debatable), the technology may be specifically intended to address this issue. In fact, even simple calculators do exactly that, though on a rather primitive level, of course



After all, any technology hinges on making human life better and easier in some way or other