Should alcohol be drunk by someone before they engage in teaching others?
Answer From The Annual Reading Schedule - Week 24 Notes For Leviticus: No. Leviticus 10:8-11 shows clearly that making a distinction between the clean and unclean, the Set-Apart (Holy) and the profane, and teaching is done best with zero alcohol in your system. There is no reason to believe you are less prone to mistakes than the Sons of Aharon (Aaron). If Yahweh decided it is best for them to not have alcohol in their system when teaching, although this was written to Aharon and his sons, why would you believe this guidance doesn't benefit you as well to help you teach in the way that Yahweh wants you to teach and to ensure you are hearing clearly from Yahweh and teaching correctly?