I would think each and every person who buys their first First Class ticket thinks it gets them into the lounge. And there may be more people doing that on a given day than there are posting on FT. Heck, I might have thought that the first time I ever flew F, too, but it is too long ago to remember.
Polaris lounges must get that the worst. I have visited them twice so far, and both times someone was trying to talk their way in. I used to see that a lot at the old GlobalFirst lounge at IAD as well.