Board Thread:Naruto Discussions/@comment-44437908-20200710093820/@comment-31715856-20200710173229

Some of that's not right. There's no reason Hashirama's kids *had* to get Wood Release. Furthermore, just being his and Mito's kid doesn't mean their chakra would by default be as strong, nor does having strong chakra mean you can do all the same things. According to the series, most Uchiha never awakened their Sharingan and not everyone could. Kekkei Genkai aren't guaranteed to awaken in one's kids.

Comparing this to the Truthseeker Orbs is not right. The orbs do allow the user to combine the chakra natures inside at will for a variety of effects, but this was never implied to mean mixing Yin or Yang with elemental chakra. After all, the Yin-Yang Style was the actual mixing that involved Yin and Yang, as he created that nature to counter Edo Tensei. Tobirama was worried because it was Yin-Yang, not Yin-Yang + something else.

The name of the Senju actually disproves the idea that the Wood kekkei genkai had to pass down. The name is actually a reference to the Senju being generalists (good at many different skills), not specialists possessing a genetic ability like the Uchiha.