Generally true, but some plants have powerful medicinal properties. Garlic is highly anti viral and anti bacterial. Before you reach for antibiotics try raw garlic. I knocked a bad case of strep throat that way. 

 Really? If i leave out raw garlic exposed for 5minutes i lose almost all noticable benefits. Ive had koreans tell me you must try pickled garlic - nothing, it was waste of time. Others, try steamed garlic, nothing, no benefits. Others like you said to cook it, again, nothing no benefits.

Raw garlic allows atleast my body to feel like it actually breathe quality oxygen & make me feel like I slept super deep overnight. 
It kickstarts natural moisture in my body (think of all the holes).
All of a sudden I can eat restaurant food and not feel sick, or eat gluten or pizza and not feel sick, i can eat boatloads of sugar and not feel sick if garlic was taken in close proximity of those eating events.
Cystic acne, if theres something deeper under my skin with no whitehead at the surface, garlic reduces or eliminates that lump within days that otherwise wouldve persisted for more than two weeks if I dont do garlic at all.
It helps reduce sinus congestion issues i may be having. 
And its hard to avoid natural boners within 24hours of doing raw garlic no matter how used and abused I am.
Work or jiu jitsu becomes easier as I have no more brain fog and can think more clearly. 

 I'm really only disagreeing on the "raw everything" portion of the statement. Garlic, of course, is one of those exceptions. 

 Oh "for everything" was to address for what ailments. Only raw garlic. I think you misunderstood my message.