Another person posted a great youtube overview that sums up and covers the broad points in a 1 hour presentation.
I suggest you watch it to catch up. You'll notice one particular thing is absent, AGI sentience doomsday isn't discussed, though it is a valid risk case too, its not what most experts are concerned with. What does concern the experts is the lack of risk management, and the exponential on exponential growth.
With that kind of growth, its not enough to keep pace, you have to predict accurately where it will be and somehow exceed it, two almost impossible problems.
I highly suggest you review the video, and take the time needed to process what the experts are saying before discounting and minimizing something so impactful.