Good question, and the answer is no.
It was included for legacy reasons, and nothing else. We know that because:
* the wording does not make clear which armors are included or not
* druids are somehow proficient in metal armors but choose not to wear them.
* there is no provision for wooden shields
It was an afterthought to include the limitation, and the lack of explanation is why it is a weak rule (or, um, "rule").
It was included for legacy reasons, and nothing else. We know that because:
* the wording does not make clear which armors are included or not
* druids are somehow proficient in metal armors but choose not to wear them.
* there is no provision for wooden shields
It was an afterthought to include the limitation, and the lack of explanation is why it is a weak rule (or, um, "rule").