Gold and Exp is suppose to be the icing on the cake, And not the entire cake, We play games to have fun, not to work a part time job.

It always ends the same, The game turns into a mindless repetitive job rather than a fun adventure.

We stop exploring for the sake of that exciting adventurous feeling, and start mindlessly following the quest markers like a trail of bread crumbs.

Besides the in game economy always implodes in the end and falls down on itself because of the ever increasing amount of gold we earn from doing almost nothing, Then it becomes almost worthless because we run out of in game things to spend it on.

Then we run face first into the max level wall where we loses all motivation for doing literally anything because we don't earn any Exp from it.