The German military has never truly put much stock in the science of war, which includes logistics. Warfare to them was about art, and about the psychological aspect of will and drive. If they want to make something happen, they will find a way. Optimism and all that crap was more important that reality, because they believed that force of will defined reality. It wasn't just Hitler who believed that, it was all of them, it is old school Prussian cultural mindset. If Germany had done the sensible thing, Prussia would still be a tiny duchy that was loosely organized with or against a non-unified collection of Germanic principalities. That tiny state only took control of it all, becoming the strongest land power in Europe because they didn't do the sensible thing.
But eventually, that came back to bite them in the butt. They managed to largely dodge reality for centuries, but it caught up to them eventually.