There would be none of those problem if gearing wasn't multiple layers of gambling stacked on top of each other intentionally designed to keep you playing. I would not be surprised if the system had bullshit stuff implemented behind the scenes like "oh the player just got new season boots and is missing new season gear in every other slot? let's drop him another boots!" and the like. They could make m+ chest just offer you a choice of the item out of loot table, like mini-vault. There could add more NPCs selling gear you want for currency. They could do that for PvP because "randomness when gearing for pvp is bad". Why not for PvE as well?