One of the Wiccans held up a squiggly, bent dagger and said they use that to channel their thoughts and energies in a certain direction.
The actual type of dagger doesn't necessarily mean anything. For some sects it might, but that's the thing about wiccanism, 2 different groups can both be wiccan, but have widely differing beliefs. Indeed, the Athame can sometimes be represented entirely symbolicly, by pointing a finger, etc. That's not preferred, obviously, but sometimes one must make do. The particular flavor I most closely associate myself with, the only real stricture about the athame is it can't have ever been used to draw blood of any kind, even animal blood, and that includes having been used to cut a steak or suchlike. Honestly, the athame is a ritual object, it doesn't get used for mundane purposes, any more than a christian priest would use the eucharist cup to have a beer while watching football on TV.
Honestly, I don't know every christian sect's opinion on the reality of the eucharist being literally human flesh and blood (Jesus's flesh and blood) at the point it is consumed during Mass. I know that that's how the Catholics view it, as you said, and given that there's about a billion Catholics, and Catholics outnumber all protestants combined, when looked at on a worldwide basis, I think my argument isn't too far off.
-Arlos