so why would you be so insistent to mine here knowing that the purpose is to auto-exchange coins for multiple algorithms?
It is not about insisting on mining here, it is about 'the purpose' is described
nowhere at zpool. To be precise, it is not described that you loose double exchange + double-to-quadruple transaction fees when directly mining preferred coin. It is not theft (there are two theft-like cases with me, but I'm not calling it 'theft'... yet), it is fraud.
Except you still haven't said how it is that you mine a coin directly on zpool.