First of all, soft skills can be trained. But most importantly, a...

But most importantly, a lot of what we end up calling soft skills in our current job market is class signifiers.
I talked about this a long time ago when I talked about “accent based proficiency” in hiring.

Huku inakaanga ni using the “right” register plus accent of English and appearing effortlessly polished rather technically proficient.
Instead recruiters screen for already knowing the etiquette of white-collar professional environments (which can be trained during onboarding and probation.)
If everyone in the organisation comes from similar schools, and SEC it is screened as someone who shares their humour, references and conversational style.
Imekuwa class-coded ideas of what is tasteful, sensible or appropriate. (this is a special as far as presentation is concerned.)
I understand needing a selection criteria but I oppose making that criteria class based.
Someone who themselves climbed into the professional class through a non-traditional route is policing accent, vocabulary, dress, school pedigree, confidence, and “polish” zenye hata yeye hakuna nazo.