1. It doesn't matter. Ineffective or not, we will still be slaves. Or dead.

2. Yes, that is true, but still, there could be sentient life outside of our Observable Universe, of which is in the same situation as us, forming civilization, discovering new things about the universe, and of course, looking for sentient alien life. So, in that case, if they are dumb enough to make AI, then the AI could learn languages and communicate, outsmart them all, and lead them to their extinction. Of course, they should be smart enough the create the Laws of Roboethics, but if they created AI, then probably not.

3. I wouldn't say 'enslaved', since we are free to do whatever we want, it's just government that stops us. We aren't set in one single loop everyday, obviously proved by choice and freedom and such.

4. True. But, Laws of Roboethics. It will most likely be encoded into the AI, so it will not harm humans, unless the information of the Laws of Roboethics was erased somehow from it. In that situation, we are screwed, unless it's a harmless AI.

5. Yes.