The reason for this is simple: Most players don’t need a lot of gold or care very much about it. An active player might earn an income of a few thousand gold per week from sending followers on missions and doing World Quests that award gold. They might then spend most of that money at the auction house buying things like flasks and stat-buffing food to do raids and Mythic+ dungeons. Gold just isn’t a big deal for them.
Edit 20 It’s been a week since this post and a lot of people are still reaching out to me with questions which is fine. I have had a few different people reach out to me to help make YouTube videos based off this guide and more info in BFA which I’m more than willing to do. Whoever gets the videos up first I will link them here for you guys to enjoy.