Griner is much, much more than just a tall woman. She got great hands, a deft touch around the basket and terrific passing skills. She's fluid on both offense and defense. If simply being tall made a woman a great player, 6-9 Alyssa DeHaan would have been National POY. DeHaan was very good, an All American honorable mention, but nowhere near as dominant as Griner.
BTW, blocks are more than just being tall, too. It has a lot to do with timing and positioning. Tall kids that just swipe at the ball usually get called for fouls but BG averages only 2 fouls a game and has not fouled out this year.