***" There are several reasons for this. First, the previous posts are correct that Protestants do not believe in sacramental grace." ***
Sorry this is not correct. It’s probably the only sacrement there may be agreement on. All Protestants believe Baptism is abolutely necessary for salvation, just some don’t believe in any sacrements or when or how it should be done. The argument with the early protestants what not over this sacrament but many others.
Baptism can be done by an Christian in accordance to the Church depending on the circumstances. Even the Catholic Church agrees it is not mandatory that it be done by a priest. Only that is be done properly. There are many times that a Priest re-affirms a baptism because of conditions that necessitated it, but it was not invalid.
An example: From Luther’s Small Cathecism, The ***Sacrament *** of Holy Baptism.
First
What is Baptism?
Baptism is not just plain water, but it is the water included in od’s command and combined with God’s word.
Which is that word of God?
Christ our Lord says in the last chapter of Matthew: “Therefore, go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit” (Matthew 28:19).
Second
What benefits does Baptism give?
It works forgiveness of sins, rescues from death and the devil, and gives eternal salvation to all who believe this, as the words and promises of God declare.
Which are these words and promises of God?
Christ our Lord says in the last chapter of Mark: “Whoever believes and is baptized will be saved, but whoever does not believe will be condemned” (Mark 16:16).
Third
How can water do such great things?
Certainly not just water, but the word of God in and with the water does these things, along with the faith which trusts this word of God in the water. For without God’s word the water is plain
water and no Baptism. But with the word of God it is a Baptism, that is, a life-giving water, rich in grace, and a washing of the new birth in the Holy Spirit, as St. Paul says in Titus, chapter
three: “He saved us through the washing of rebirth and renewal by the Holy Spirit, whom He poured out on us generously through Jesus Christ our Savior, so that, having been justified by
His grace, we might become heirs having the hope of eternal life. This is a trustworthy saying” (Titus 3:5ó8).
Fourth
What does such baptizing with water indicate?
It indicates that the Old Adam in us should by daily contrition and repentance be drowned and die with all sins and evil desires, and that a new man should daily emerge and arise to live
before God in righteousness and purity forever.
Where is this written?
St. Paul writes in Romans chapter six: “We were therefore buried with Him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we
too may live a new life” (Romans 6:4).