Juana’s treatment of coyotito’s scorpion sting with a seaweed poultice is described as being “as good a remedy as any.” however, it is still viewed as inferior because it

lacked the doctor’s authority, was simple, and didn’t cost anything.
uses seaweed, which costs a great deal of money.
does nothing to coyotito heal from the scorpion sting.
was juana’s fault coyotito was stung in the first place.