From what I can tell the issue here is that Rob Pike thinks the label "generics" is inaccurate? Seems like a far cry from what you have accused them of. I think theres not only a lack of evidence to convince me, I think your claim is just straight up unsubstantiated. I think an unbiased, responsible observer would have to conclude similarly to me.
A pretty apt write up.
But I accept there’s probably not an amount of evidence to change your belief on Go’s dogmatism. And that’s okay! You like a language. That’s great!