It will, and is helping humanity in different fields already.
We need to diverge PR speech from reality. AI is already being used in pharmaceutical fields, aviation, tracking (of the air, of the ground, of the rains...), production... And there is absolutely no way you can't say these are not helping humanity in their own way.
AI will not solve the listed issues on its own. AI as a concept is a tool that will help, but it will always end up on how well its used and with what other tools.
Also, saying AI will ruin humanity's existence or bring "disempowerment" of the species is a completely awful view that has no way of happening just simply due to the fact that its not profitable.