I would not say its true for every spec in the game. Almost every dps spec is very straight forward. Stack this then stack that then you reach max DPS. The same is not true for tanking.
x talent is better than y on single target fights and y is better than x if 2 targets, z wins on AoE.
Etc etc.
The thing is, the basic questions are not even answered in the sticky.
What is the difference in gearing between 10 and 25 man?
What is the difference in gearing between normal and heroic raiding?
How should a paladin gear differently depending on the second tank in the group? How you gear if you have a druid, paladin, warrior, monk or dk fellow tank is not the same.
How to gear differently depending on your healer setup?
How to gear differently depending on your dps setup?
Everything matters.
I understand you want people to limit posting non-sense questions.
Though if people can not ask question about gear, reforging and talents/glyphs. What should people ask questions about? Seeing as these types of questions are the most common ones. Just look through all the threads in the forums 90% of them is about gear, talents or rotation.