I think the opinionatedness doesn't have to stop, just the opinions can change in the face of evidence that a particular abstraction is more useful than the archetectural hazards it presents developers.
Maybe I could do some kind of poll of people hitting this or other rough snags that would be solved by generics or something similar? But I am afraid that (rightfully so) go fans would feel the poll could be overrun by people who only casually dabbled in go.
Same with counting the many complaints of people every time this topic is brought up- the general response seems to be that they don't want that kind of programmer here anyways, so go away.