Amen to that, and he follows it up with the means of killing the old man and being raised with Him to walk in newness of life.So now you are interested in context, well don’t forget these two verses
What shall we say then? Shall we continue in sin that grace may abound? Certainly not! How shall we who died to sin live any longer in it? Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death?
Paul is teaching them not to continue in sin.
Thank God for the exhortations of faithful men !They way he teaches them is this —
Therefore do not let sin reign in your mortal body, that you should obey it in its lusts. And do not present your members as instruments of unrighteousness to sin, but present yourselves to God as being alive from the dead, and your members as instruments of righteousness to God. For sin shall not have dominion over you, for you are not under law but under grace. Romans 6:12-14
Exhortations are never bad for anyone.If by getting dunked in water, we are somehow automatically dead to sin, because our physical body that contains sin is done away with, why does Paul give us these instructions?
He is giving the "how to" to the readers of Romans 6.
BTW, that dunking in water is our immersion into Christ and into His death, burial , and resurrection.
Like Rom. 6: 5 says..."For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection:"
I can attest to the truth of that.