haha guy, some parts of your post read like an Apple refurb is an "as is" purchase. Just in case you don't know, it is not. They come with the same full warranty, with the same return policy. There is no "gamble" of which I am aware. Instead, if you bought one today and it had one of these same issues, you could return it just like buying a new one today and finding the same issues.
My thinking is that if it has been refurbed, this screen issue(s) has been checked before repackaging it for sale. If the issue exists, it's fixed so that the refurb buyer doesn't become another return/replacement scenario.
I'm also thinking the volume of refurbs must be high, so the typical discounting will probably not apply (probably better than typical). Yet, I continue to be surprised in that none of them seem to show up in the refurb section, and we're not that far from a refresh if you follow the buyers guide history.
The new model 21" versions have been showing in the refurb area almost since these new models were launched. And I did find a few 27" models showing up for just a little while soon after launch too. But I've seen nothing on the 27" since (though the 21" are pretty consistently available).