It might be true if you (like the author, at least that's my interpretation) include the use by the original plants, which I guess occurs until the plant is (destructively, which I'm not sure how common it is) harvested.
Re:A miracle drug sold over the counter
by lylejantzi3rd on Thursday March 16, 2023 @05:21PM
(#35188851)
> Is that true?
Plants use caffeine to kill bugs.
CGP Grey video on the matter: https://www.youtube.com/watch?v=OTVE5iPMKLg&t=69s
> The drug that I’m thinking of is currently predominantly used as a pesticide
Is that true? I would think it's predominantly used as a drink additive...