> You can't vote for the head of FCC.

FCC commissioners are appointed by the president (who is elected) and confirmed by senators (who are also elected). The chair is then chosen from those commissioners by the president (who, again, is elected).

Saying you can't vote for the head of the FCC is like saying that you can't vote for the Secretary of State. Sure, you don't cast a ballot for them directly, but you do wield influence by electing leaders to represent your interests.