Go chose tabs over spaces which are configurable in your editor, so everyone wins. Elm has other awkward style choices, like 'comma-first', and excessive line-breaks in-and-around statements. If they had less obnoxious defaults, people might be less bothered about this issue.
And honestly, as a dev you work at a company for what, 3 months minimum. How hard is it to setup a .eslint file, vs. having to always write code in a style you don't enjoy.
Universal consistency of code format just isn't that important, consistency within a team or company is what matters, and you don't lose that by allowing configuration.