That's a pretty weak argument.
Congresscritters miss votes all the time for various reasons.
If you have proof that Hunter missed this vote intentionally, or that his vote would have saved Terri's life bring it forward.
If not than you are pathetic for bringing this up.
Would you then agree it's as relevant as anyone bringing up Giuliani dressing in drag for a charity event? Unless one's point is proving he has a sense of humor.