Good for you... but you are incorrect with the "only." The word sacrament is from the Latin sacramentum which means oath-taking. In any oath there is the understanding of blessing in obedience and curse in disobedience.
How does this apply to the other sacraments? What is sin but a repudiation of our baptism and/or confirmation? What is the result of failing to receive God's Mercy in reconciliation? Can we fail to live up to our holy orders or marriage?
... You get the idea. I'm on an iPhone.
I find the Corinthians thing particularly sobering.