I am not well-versed in Go, but isn't it because Go supports specifying multiple parameters with the same type by just using a comma. Your suggestion would lead

I am not well-versed in Go, but isn't it because Go supports specifying multiple parameters with the same type by just using a comma. Your suggestion would lead to syntactic ambiguity except when only a single parameter is provided. Additionally one can provide only types when parameter values are not needed and this requires there to be a typename to differentiate between no parameters.