It's unnecessary by virtue of being achievable through simpler means.
It has been one of the core elements of TES series for as long as i can remember.
Argument for tradition. Tradition is not necessity.
Just because somthing can be changed and simplified, doesn't mean it should.
Doesn't mean it shouldn't, either.
Simplicity has its place when things become tediously annoying, not for the sake of making things less involving and complex.
Involving is a nice sounding word. It's also meaningless. Elegance is pretty nice sounding too. Complexity should never be a goal in itself.
The number one problem with complexity is that it's difficult to manage. They build interdependencies that complicate changes. Changes must inevitably happen and elegant systems make the outcomes, desireable and undesireable easier to predict, find, and account for. Complex systems run escalating budgets with each iteration as changes have cascading effects.