That's not an accurate summary of the reasoning. It's not just the complexity it adds to the compiler, but to the type system in general, and to the complexity

That's not an accurate summary of the reasoning. It's not just the complexity it adds to the compiler, but to the type system in general, and to the complexity it may bring to user code. The Go team is not against adding generics, and there have been proposals for them. They have simply not landed on a proposal that they feel is a strong fit for the language.