Why? The Church is there not merely to baptize but also to teach, forgive sins, bring the Eucharist and save souls.
Well, since:
1. I was Baptiszed in to Christ (1 Corinthians 12:13; Col. 2:11, 12; Ephesians 4:5) by the Holy Spirit when I first trusted in Christ (also Ephesians 1:13, sealed in Christ);
2. All my sins were paid for, propitiated at the Cross with one sufficient sacrifice forever (Hebrews chapters 9 and 10; etc.)
3. My soul is already permenantly saved and I have the witness of the Holy Ghost concerning that (Romans 8:16; 1 John 5:10; etc. . . . .
. . . if the purposes of (whatever) church (you are referring to) are as you state, then, all of those functions having already been finished, you have convinced me that I have no need of it.
Why? The Church is there not merely to baptize but also to teach, forgive sins, bring the Eucharist and save souls. [emphasis mine]God alone can forgive sins.
People and churches are only witnesses.Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
John 14:6
The church has no power to save. Only God has that power and privilege.