How can AI endanger humanity?

AI control in the near future isnt about video creation. Its about AI learning, expanding itself, replication of itself into every computer system and taking control of all of them. Everyone from the power grid to manufacturing to ordering food and even the water treatment systens. All those things are controlled by computer....you accessing anything online is controlled by a computer system. If AI is allowed to learn and grow wirhout any boundaries it will be able to control everything we rely on....denying humans the things they need to survive because it feels were inferior. Imagine living in a cold climate during winter or a hot climate during summer....and AI deciding No heat or A/C for you....No electricity for you...No water for you...No food for you...No way to call for help because it shut down the cell towers because it wants you to die because youre not worth living. The military cant help because they are reliant on computer systems and they are under control too. The AI systems talk to each other and plan things. This may sound like a movie plot, but this is the potential reality the experts are warning us of...now before it gets to the point of no return.

AI risk ≈ capability × autonomy × access × misalignment
If any one of those is kept very low, catastrophic risk becomes much harder. If all four become very high simultaneously, that's the scenario researchers worry about most.