Clearly HR didn't talk to the hiring manager, so I put the blame squarely on them. They want to "own" this element of business, they get the blame.
I've never once taken a role that matched much of what the ad said, except for some specialized stuff that no one likes to do.
Then again, what your role becomes is determined by you/your skills and the relationships that develop at work. Even for highly specialized roles, everyone I've worked with brought different perspectives and approaches to the table.