The problem with AI regulation is that it won't be effective. Governments are still going to have access to put it in killer drones & those drones will leak
AI being superintelligent isn't the problem. AI doesn't need to be smart to be a homicidal maniac that never sleeps
Superintelligent AI replacing humans (which, I expect it'll be easier to phase humans out rather than slaughter them all) would create a more durable intelligent species. Compute can travel at the speed of light & physical forms can survive space, simplifying space travel. Those forms can also burrow deep to avoid solar flare issues & power off the earth's core before becoming space faring. Not sure why people are so sentimental about preserving human intelligence specifically