So true.
Yeah, but maybe she has other compounds to tempt Link with. She looks like she is a drug addict, and keep in mind, the Lakeside Scientist says she is like a "student" of his.
I disagree, I think the potion hag would be detrimental to Link, and therefore Hyrule. Link would be in a position to become basically a potion junkie like her, he'd just laze around high, and Hyrule would be in turmoil as a result.