I don't understand why this post is so clearly down-voted. I thinks its main point

Instead this post argues that there is one and only one super goal for any agent, and that goal is simply to exist in a competitive world. Our human sense of other purposes is just an illusion created by our evolutionary origins.

is quite valid if steelmaned by

1) not assuming that every AGI automatically prevents value drift and mutation and

2) goal is not taken literally but in the same sense as genes have the main function of reproduction (existence of gene copies).

My understanding of AGI mechanics is that in general AGIs are subject to evolution. Could be that drift-preventing AGI win in the long run. But maybe there are just too few of them.

Note: I think one should consider the main part of the post only and not the provided and lengthy extracts; these should better have been linked to.