Quick questions: javelins with dueling style and natural weapon proficiency

[Segev]

Semantically, we have agreed that a thrown weapon that strikes a target and delivers is "wielded" even though it is not in one hand when it strikes the target and delivers the damage.

We have not agreed that it has changed how many hands are wielding it when it strikes the target.

“How many hands does it take to wield a shuriken?” “Well, that ninja wielded one in each hand.”

At no point does it make semantic or colloquial sense to claim the ninja was wielding the shuriken in zero hands.