[geodel]

I guess you are getting in to Go design philosophy. These questions are similar to "why go does not allow lint to just issue warning for unused variables / packages instead of giving hard compiler error?" The answers to these are unfortunately unsatisfactory, no matter how logical.

Reasonable thing is to use language which align your philosophy.

[grey-area]

I've used Go for almost a decade and am pretty happy with it, including the rule you mention. It's fine to disagree with decisions made, it may or may not be heeded, but if no-one ever disagrees the language would be poorer for that IMO.