I can't call it a design oversight no, because I'm not sure what reasonable alternatives were considered before Go v1 was released. I also don't have context of

I can't call it a design oversight no, because I'm not sure what reasonable alternatives were considered before Go v1 was released. I also don't have context of all the decision factors that went into Go's spec. To be honest, I'm not anywhere near an expert on programming language design - I'm probably the wrong person to ask. I am thankful that they haven't broken the spec to change that design, but maybe others don't care about that as much as I do.