Board Thread:Theories and Speculation/@comment-25319479-20171101152711/@comment-33683501-20180117145255

Kekkei genkai are not like the extra chakra natures you can learn/develop as you go along. Plenty of characters have access to more than one chakra element. This does not mean they have the kekkei genkai that are the combinations thereof. Personally I think somebody just forgot that, saw she was slated to have earth and water, went 'that makes wood, right?' and forgot about the kekkei genkai part of that.

...It's that or I declare Hiruzen must have had kekkei tota because he knew all the chakra natures and Suigetsu can use Ice like Haku because a databook says he has wind and water, haha.