No one can tell whether AGI in the form of something akin to biological brains will happen. How will we build something we can't comprehend the architecture of?
Also, I think their point was not that AGI will never happen, it's more that it doesn't matter whether it happens or not, because AI/AGI will not solve our problems (well, it will solve some, but create so many more that in the end we've really achieved nothing).
I think we are further from AGI than people think. I doubt I will live to see it.