I don’t like the loose fit especially in the JUC because the nail head twists but I think people should wear it however most comfortable for them. No right or wrong.
You can go back as far as 2017 and see that Cartier shows a very loose fit for both the Love and JUC on their IG page. I’ve seen them advertise the bracelets both ways. It’s completely personal preference. Just realize if you wear them as a loose fit and stacked, the screws will loosen quicker. I tighten mine every once in a while which is very easy to do. They don’t rotate on their own, but since they are loose, I can easily turn the bracelet to tighten the screws myself. Takes only a few seconds.
These are only two examples from IG. There are more.