Or perhaps he flies all the time (they only had one airworthy jet) and was in the habit of running into final reserve, had never been bitten before and had become complacent. Feed tank low warnings come on, that's normal to him. Maybe he doesn't bother with the checklist at that point because he knows it's a F24 landing, pumps on and fuel feeds open etc. All very speculative of course, but the events could just as easily be the result of a complacent current pilot becoming habituated to very poor fuel management as it could be an un-current pilot being out of their depth.