Yes? And once the cockpit preparation is finished the fueller is still hooked up. Look, sometimes they've finished but sometimes they haven't, there is nothing in our SOPs that ensures the fuelling has finished before the PF does the overhead panel.
Going strictly by literature, it says during cockpit preparation no white light. So either put the fuel pumps on during refuelling or do the prep after refuelling. I am sure you are aware of the A320 incident where the crew taxied, took off and climbed to 370 when both engines flamed out and during dual engine flame out procedure they realized that the fuel pumps were off. They relit engines came back and landed.