I would like to see some content from the go team on generics or clear that fits your claim. Yes, there are many in the community who speak the way you suggest, but you don’t seem to know much about the Go teams pov.
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.
