Well, a super AI needn’t be malicious towards us. It merely need to be apathetic. I personally don’t go out of my way to hunt down ants in my yard with the goal of wiping the filthy things out. Others might actually go out out of their way, routinely applying poisoned bait or whatnot. Not I. But, I wouldn’t blink at running over them in massive numbers with the lawn mower, digging up their ant bed if I wanted to do something with that specific spot, etc, or flooding them out if I wanted to do some watering or washing outdoors. But, I’m not anti-ant.
Sure, extinction sucks, but it isn’t the only really crappy outcome. Being allowed to exist, as in there isn’t a concerted effort to wipe us out, could still make for some bleak living.