We can't "save ourselves" through the sacraments. This is an ill-constructed question.
Sacraments are how salvation, saving grace that is, is communicated, transmitted to us. Your question is like saying "why do you have switches and wiring, I thought you believed in electricity?"
When you bathe the baby, is it possible because God created water and makes it rain, or because there are pipes and faucets in your house?
SD
"Sacraments are how salvation, saving grace that is, is communicated, transmitted to us."
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I was unaware of this. Can you lose your salvation if you fail to participate in the sacraments on a regular basis?
In my faith once I've been saved the HOLY SPIRIT indwells in me to guide me and convict me of my sin and JESUS has promised that once he has me he will not let go.