The assumption that AI will eventually be able to do everything we couldn’t is so lazy

I see it so much on this sub and others believers of near singularity.

“AI will end human’s biological clock. AI will do this. AI will do that.”

And the predictions are stuff that’s nowhere on the horizon of our knowledge or attainment. But somehow, AI will figure it out in the next few years. And this AI that will solve so many problems will be created by the humans that can’t solve the problems? We can’t solve these hard problems but we can somehow create a machine more intelligent than us that can? The reasoning feels like a nonsensical science fiction fantasy. I think AI will undoubtedly be useful but not what so many people on here think.