Are ID/creationists arguing that proteins are designed because they look like wedges?
I wouldn't doubt it, but does it matter what they call the machine?
It doesn't change the validity of the argument if, rather than being a wedge, the machine is something more sophisticated like a pump.
Quibbling over whether or not it really does superficially look like a machine seems like the wrong approach. Especially given that being a "machine" can be something as simple as having a triangular shape.