Would suggest soft-skills are extremely important in the hiring process and therefore, at least in the government sector, because the primary way one advances is getting hired for the advancement. The only downside is that one's soft-skills need only impress the hiring committee (be it 1 or 5)
Would offer that generally speaking soft skills are not emphasized enough within the government sector. IMO because the hiring committee selection process doesn't require someone who has good soft-skills to be part of selection process.
Self-promotion is extremely important to career advancement, if you do not convince the hiring committee that you are the best qualified you will not be hired