Agree that hiring is sure important, but I think as long as hiring is competitive, and most candidates are bad at writing, then compromises are almost inevitable?
If FAANGs started putting more weight on technical-writing skills in their hiring, we would get Leetwriting and technical-writing bootcamps. Meaning, it’s just an education issue to some extent, and there’s currently too little motivation to train writing as a skill.
Leetcode doesn't raise people's IQs, it gives them practice effect on tech's favorite IQ test. So I don't think leetwriting would work for anything except getting practice effect on the new verbal IQ tests.