Peanuts aren't nuts either and they even have the word "nut" in them!
But they are Peas of a sort (legume).
I like nuts of almost all kinds, but I have never understood why people eat Sweet Chestnuts. They are just nasty, toasted or not.
Now a Brazil, Pecan, Cashew, Pistachio or a Macadamia will have me drooling, but of those ONLY the Brazil is actually a nut and is mildly radioactive.
The rest are dry drupes, but we call them nuts.
As for Nutella, it is mostly Hazelnuts/Filberts/Cobnuts which are of course not a nut (dry drupe) and are bland when eaten raw.
Nuts huh?