The statement actually confirms baptism in water for a purpose other than taking a bath. The word is clear, God established the purpose of water baptism. Those who believe and obey have their sins remitted/washed away/destroyed as made possible through Jesus sacrifice. Paul explain this in Romans 6:3-6.I have not read anything beyond the first page. And, I am not so sure that I really care to. Because, I do not wish to waste time arguing with you.
In 50 pages - has no one told you that the phrase "not the putting away of the filth of the flesh" tells us explicitly that it is not talking about 'soul-salvation'...?!?!?!
I am guessing someone has but you are not listening.
You need to exit 'teaching' mode and enter 'learning' mode on this topic. Go back and study it again in the context of the chapter and the book.
Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death?...
if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection:
Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin." Rom 6:3-6