This is a simple question, perhaps better asked elsewhere, but I'm quite curious:
Besides Puzzling.SE, is PPCG the only SE site whose questions are challenges rather than appeals?
Pretty much every other SE site has questions that are asked because the questioner is honestly confused or uncertain or at least curious about something. But here at PPCG, answers do not really answer anything, they just follow a spec to produce something that was already expected (though often in outstanding ways).
I've looked at many of the other SE sites, but not all, and I'm not a frequenter on any of them but PPCG. Are there corners of other SE sites where challenges are the norm rather than appeals for help?