First, I want to address the precision of your response:
The content you link to is about AGI, which is a theoretical concept, and it is not at all clear that the path to AGI is incremental from our current approaches.
Regardless, it really feels like a pure marketing move to link concerns about AGI to our current tool chain of decision engines, content generators, and spell checkers.
Nothing that is publicly known about what OpenAI or its foes are currently working on suggests in any way that it should be linked to the emerging of AGI.
Now to the more general points made in the content you link to:
As the author states in the preamble, this is a "poorly organized list of individual rants".
And it seems that none of those make a good and plausible case for why even the theoretical idea(!) of AGI is particularly dangerous. Of course, with a good deal of good will, I can follow most of the ideas listed, but it feels forced and certainly requirement heavy.
Remember that the state they are thinking about is is in the future (probably far), and everything they write is hypothetical.
It's like if we learned to throw a stone for the first time, and suddenly the village is full of alarmist people discussing high-minded ideas about "what if everyone is suddenly thrown away, by which we mean displaced at high speed in a vaguely known direction - by a force we yet can not understand?
It's mostly not serious or related to the current technologies.
If someone is alarmist and wants to be taken serious they should be required to make an actual argument, themselves. .. without fleeing into references, vagueness or unnecessary complexity.