So, you sin by "accident" every time you sin?
Give me a break.
You don't have to make any choice at all to sin. Sin includes any missing of the mark of God's perfect standard. We commit sins of omission as well as commision. There are sins of imperfect motive, imperfect intent, even our good works are imperfect.
In order to be perfect, we would have to be as pure as Christ.
But the fact that we are not as pure as Christ does not make us a slave to sin.
Sorry your theology is so UNBALANCED.