I once worked for recruiters as a BDM and also taught a job club that showed people employment skills such as writing the right resume, digging for a suitable job as opposed to simply answering ads and sending out resumes, cold calling and proseting and ultimately building your career.
If people did not work towards a career they were properly suited for, perhaps just being who teh interviewer wanted them to be, they soon returned unemployed again. There's just no longevity in pretending you are who you are not.
Certainly personal change and ADAPTATION is requried in many positions, but simply pretending to be the person you aren't will not result in a lasting career most of teh tie, it is worse than false advertising or a made up resume that you can't fulfill.
