Yeah, Griner at best would be a decent men's D2 player. Probably more likely to be a good D3 player.
Just to put it in perspective, and this is referencing someone I know I probably shouldn't on a Syracuse board, but I grew up playing with Taylor Coppenrath, the former Vermont star. Vermont isn't exactly a power, but he's still playing professionally internationally. He would score 60 points on her, without question. She would never be able to hang with even a men's player at that level, let alone any "good" D1 talents.