If your previous job title was "Doer of a Thing" then a prospective employer is more likely to consider you for a job doing the same (or similar) thing, as it shows you have prior experience doing a thing.

No, it shows that you previously had a job title that calls you a doer of things. I find that these don’t generally correlate with ability to actually do those things.

You hire a lot of programmers that have never held a programming position before?

It’s because LinkedIn creates a social cost for lying, and it also creates social proof because coworkers can agree that you worked there.

As opposed to claiming whatever the hell you want in resume.pdf.