I'll go out on a limb and offer up: spent too much time in his juniors/formative days blasting serves and FHs. His BH wasn't very magical when he showed up on tour. Only because so-so (and that's probably overly nice) late in his career.
A lot of guys would be better volleyers if they came in on better approaches. I can't believe some of the shots they come in on.
"I jump in it!" Russian Billionaire, DirecTV Commercial...