All stack sites have their roots in stackoverflow, they all use descendants of their software, communities and rules. As such, they will all exhibit characteristics of stackoverflow, objective measuring through a scoring system is a core characteristic. Points for questions and answers. Upvotes and downvotes for questions and answers, upvotes for comments, badges for achievements, total views, and perhaps invisible to users, search engine ranking and conversion rates.
This is the dna of stackoverflow, the goal of these sites is to increase these numbers to grow their traffic. They do so by using rules and judging the effect these rules have on the scores. Rules with a good outcome stay, rules with a bad outcome are dismissed or fail to become popular.
Code golf, as a stack descendant, needs rules to grow, I find it poetic that it exposes this quantifiability that is so intrinsicparticular requires users to partake in the site even further by requiring that every question implementcreation o their own objective metrics. It merely takes objective scoring one step further.