Sounds to me like he is NOT advisinf preworkout cardio , just cardio other time or days other than post training.
I was told by a realy smart dude whos oppinion i hold in the highest reguard that doing 45-60 min fasted low intensity cardio in the am then again in the pm just before bed was a great way to lose fat especialy if you weight train at the 3-5 O'clock time frame
if you can shoot 2-4 iu HGH befroe each session it works even better.