this is the game. you want higher gear? do PvP, M+, Raiding. If you like none of it do world content and be content that you will only get gear that goes up to a certain ilvl, you wont need anything higher anyways since you're not doing any of the pillars of WoW to begin with.
Now if you want to go for something else world content could be improved a ton to make such a thing possible but with that difficulty will be introduced. Im thinking 1 to 2 huge world bosses that have actual mechanics and only so many people can queue into etc etc. so they'll have chances at higher gear at a much slower pace