The concern that some feel about this is not, I believe, based on their misunderstanding of Wikipedia's fundamental policies. Rather, it is about how those policies should be interpreted, enforced, and utilised.
Personally, my concern is that policy interpretations based on highly contentious articles may lead to poor general rules: "Hard cases make bad law". I'm also concerned that turning policies into rigid rules, procedures, committees and the like may advantage those who like to rules-lawyer over those with less patience for minutae.
Every rule set down in stone is a rule behind which a troll can hide. Or turn into a club to beat those they want to antagonize.
Every time we are tempted by instruction-creep, we should think "How will this rule be abused by the ill-intentioned?"
-Matt (User:Morven)