I do not know dialectical materialism well enough to be able to respond to your points, but I presume you're addressing similar caveats as what @TabularTuxedo says? Material limitations are absolutely real, but the capitalists hope that AGI will magically solve all of these issues (as I have posted here, and saw that you responded).
I also don't think this is very realistic, but it doesn't stop them from screwing all of us over in the process. I've noticed we've had this same conversation on previous threads, and I want to make clear that I don't disagree with your points on this plan being much harder to pull off than it seems.
I just think that this maximalist version of the future that the capitalists want is very good for organizing. It makes explicit all of the psychopathy that they have when they think about dealing with us, and makes clear the two pathways we have ahead of us. The liberals need to realize that if they keep compromising, they will make sure we, the workers, lose forever.
P.S. do you have good resources on dialectical materialism so I can learn more?