It's a hypothetical mechanism for the transmission of information. It's not taking a shortcut, it's just a different mechanism for getting there, in the same way entanglement propagation can't exceed the speed of light.

And that's why this technique is being described as a wormhole - it's a relatively good simulation of one in terms of some of the measurements they want to make and can be used to carry one of the properties we think a wormhole should be able to carry.