Again, if you actually read the post I linked a thread directly archived on this very site. There was a guild in WOTLK called <Undergeared> that specifically went out to clear raids wearing nothing but blues. I assure you it is most likely still possible, it is just a more difficult path that most people don't want to mess with. Here is the link again: https://www.mmo-champion.com/threads...-gt-Chronicles
As far as PvP goes. I have long been a proponent that PvP should be run like GW2. Everyone has the same base stats depending on spec/class, you get free option of different gear sets that are all the same ilvl. PvP should not have a gear component to the degree that it currently exists, and anyone who thinks otherwise just enjoys the advantage non-skill based effects bestow upon them. It's even worse in WoW PvP, because the most skilled people get the most passive stats which widens the gap even more.Rules of the game
The philosophy is that we do not use epic items in our ventures. This means that we cannot use epic gear, epic enchants, or enchants that would require an epic item to be disenchanted. We cannot enchant our gear with enchants requiring Abyss Crystals, and we cannot use epic gems.
I should add, the argument that doing PvP should give you gear you can use outside it is pretty unpopular. Too often we end up with pvp gear items being BIS for even mythic raiders. Overwhelmingly more people don't want to PvP for gear than people who do.