When people thought of SeeDs, they thought of people like Squall and Quistis and Nida.
They didn't with Zell.
Zell was a martial artist. His weapon was his body, and most of the time people didn't realise. It was like they thought he was just along for the ride, and the shadow boxing was just a kid not being able to sit still.
It's useful though - Quistis and Squall and Selphie and everyone are good, sure, but only as good as the weapons they're holding, the magic they've junctioned. They're the best Garden's got to offer - but only when they've got a weapon in their hands.
Zell's weapons are his hands.
He just needs himself.
Being underestimated, he thinks, is a pretty fair trade.