This is more of a complaint that a question. There is confusion in tense nomenclature. What is often referred to here as Pretérito Perfecto is really Pretérito Perfecto Compuesto.
The Pretérito Perfecto Simple is referred to Pretérito Indefinido. The action in the Pretérito Perfecto Simple has definitely been "perfected". When doing quizzes quickly I often make a mistake when the Pretérito Perfecto is asked for. It would be nice if a uniform terminology were used in the teaching of Spanish