Why is it wrong to assume every Form VI verb denotes reciprocal action?

Seven Semantic Functions of Form VI (Tafāʿul): Reciprocity, Multiplicity, Pretence, Response, Equivalence, and Independent Uses

• The same form also has pretence, response, equivalence, and independent uses
• All Form VI verbs are passive
• Form VI cannot form verbal nouns
• Form VI exists only in nouns