They sell very well. Most people enjoy it as a tea. Many buy it them for crafts. You're than welcome to take some time and research their historical uses and where the use of them stands now with modern uses. You not knowing what something can be used for as nothing to do with how that something can actually be used in or is used. Who would have thought? A shit ton of people.
Who would had thought some random person on the internet would passive aggressively talk shit and show themselves ot be ignorant of the very subject they're trying to tlak shit about...