Shaq's point is that he could be getting closer to 30 if he played in a traditional style.
Could he though? Very few players can score that many points and be as good as he is on defense, and of course he only takes less than 14 shots a game (now if he could raise his ft%...)
Sure, Shaq was getting 30 in the playoffs but he was also taking 20 shots and Shaq just happens to be one of the most dominant players ever