True, but by specifically listing which alcohol is allowed (beer and wine), the implication is that other types of alcohol (including spiked seltzer) is not. As PP said, YMMV in trying to bring it on; it depends how closely they are looking at it. I've heard some ports are also stricter than others.
Honestly, I think
DCL needs to revisit that policy. It was likely written before spiked seltzers became a thing a few years ago. Given their low(er) alcohol content, I imagine DCL might let them on. If that is the case (which is my assumption), it would be nice if they would update the policy.