It's not irrelevant, it's the entire point. The whole Go ecosystem uses a single formatter. There's no need to force anyone, everyone just uses gofmt. You will not be able to replicate that level of ubiquity easily at all.

You can only force everyone on a project to use a formatter if you are the one who has the authority to decree what will be done on the team. OTOH, if you are but a team member and you join a team where the manager does not think common formatting is important, then you get f*ck all.

So being built-in, idiomatic and expected cannot be over-appreciated.