Is "Adaptive' in the runes at all intelligent?

For example, if I play WW, his abilities scale best with AD not AP. The same with Corki. However, if I get for example Transcendence or Gathering Storm in the Sorcery tree, I'm guessing that you actually get AP because you deal magic damage. If this is true, it makes such masteries useless on said champions. This restriction of viable options would be unfortunate. I hope I am wrong.
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