That's untrue. You can do something out of spite that still benefits you. For example, "Jessica tripped on John's garden hose. She didn't like John. She didn't get injured when she tripped, but sued him anyway out of spite." See. Not mutually exclusive. Spite can be boiled down to "because fuck you, that's why". It doesn't mean there can be other benefits.
That's untrue. You can do something out of spite that still benefits you. For example, "Jessica tripped on John's garden hose. She didn't like John. She didn't get injured when she tripped, but sued him anyway out of spite." See. Not mutually exclusive. Spite can be boiled down to "because fuck you, that's why". It doesn't mean there can be other benefits.