Would these be people writing "production" code in Go who need generics, and for some reason have not been instead using a language with the features they need?

Would these be people writing "production" code in Go who need generics, and for some reason have not been instead using a language with the features they need? The whole continued argument is odd. The "whole generics are important" and "Go is too simple" thing seems counterintuitive when all of the comments mention Rust, Haskell, Java, etc., yet the proponents of generics are not using those languages instead. Why if Go does not have the features one needs, would a person be compelled to use it?