It's for people with a lot more than four questions. Every Jewish holiday is an opportunity to work on a certain aspect of personal growth. For this the Almighty brought us out of Egypt. That is license, not freedom. Freedom means having the ability to use your free will to grow and develop.
Slavery is non-thinking action, rote behavior, following the impulse desires of the body.
All of the commandments associated with Pesach enable us to relive and experience the freedom our forefathers experienced in leaving the land of Egypt in order to serve the Almighty. To come close to the Almighty, which is the ultimate pleasure in life and the opportunity of every mitzvah and holiday, one must remove his own personal arrogance. On the evening preceding Pesach there is a serious search of the home for chametz. The Cohanim are commanded not to serve while intoxicated. The inaugural service is completed.