Yes, totally agree. I was just commenting on this "real vitamin c" woowoo some people have bought. Of course the plant (extract) is going to contain lots of more stuff than the isolated vitamin, some of which might be beneficial, especially in combination. Nature tends to do things like that
vitamin c powder is ideal for use as a drug, a specific purpose when large doses are needed. I would not try to get 20 grams of vitamin c through plants, it could easily turn toxic.