When push comes to shove and they can't find an exact match for their job spec among the candidates (can they ever?) then they have to look for other abilities.
More important to them is to know which skills they value you ringing and which skills they can teach you or you can learn elsewhere or on the job.
I'd favour a candidate who said " I don't know much about it because it didn't feature in my previous jobs but
I can learn." and who then shows how they had to learn new skills on their last job.
I'd put ability to learn and to think above some other "skills". Let's face it, no two jobs are the same and in our own jobs and in new jobs, our ability to think and learn and apply what we have learned ought to be key properties.
Of course, HR and management don't believe in indispensibility and nor do they believe that they should have to invest time or money training people.
They think (and depend on) recruiting pre-trained people and rely on other people doing the training, most usually, their competitors.
Of course, HR don't really think it through nor do management. I wonder how much time and thought they really give to defining the job spec and candidate profile. It's why we live in an imperfect world - imperfect people in management and HR.
So of course, people may feel inclined to lie on their resume's but the of the ones who lie you have to hope you choose the ones who can make good on their lie (St Elizabeth Of Hungary Syndrome) who are quick learners and not the ones who will spend the rest of their lives ducking any tasks calling for the skills they are supposed to have but don't.
JMW