6'9" doesn't make you a basketball player. You still gotta box out, bump, run, practice, set picks, and rebound. A soft player can't do any of the above, even rebound.
CharlesBarkley could still dominate WNBA. At 6'4" and a hair, he almost dominated at power forward, except for shooting against McHale and Parrish.
BritGrier is 6'8". Is she gonna dominate in WNBA?