That is kind of the niche of the moon druid. Massive amounts of health that allows them to tank better than any other class barring the barbarian, but they need active magic so that enemies aren't free to just ignore them and go after the rest of the party.
I just realised this is another advantage Moon Druids have in BG3. Enemies base their targetting on AC meaning the Druid gets to do its job VERY well by virtue of having low AC high HP. They don't need to do anything else to be able to draw aggro.
