Speaking of John the Baptist, Mark and Luke both present the same thing
:Mar 1:4 John the Baptist appeared in the wilderness preaching a baptism of repentance for the forgiveness of sins.
Luk 3:3 And he came into all the district around the Jordan, preaching a baptism of repentance for the forgiveness of sins;
It was a baptism OF repentance FOR the forgiveness of sins. In the Greek, it is εἰς ἄφεσιν ἁμαρτιῶν (unto the forgiveness of sins) , the exact same expression given by Peter in Acts 2:38.
So argue all you want, but they are the same. It is a baptism UNTO the forgiveness of sins. It is in baptism that God forgives the sins of the repentant believer.
I do not and I have not claimed that baptism brings the remission of sins. I do claim that it is in baptism that God forgives the sins of the repentant believer.
In Titus 3:5 the washing of regeneration is, in the Greek, the same washing as Paul spoke about when Ananias told him to "Rise and be baptized and wash away your sins, calling on his name (Acts 22:16). The Ethiopian eunuch certainly understood the need to be water baptized. So beginning with John the Baptist and moving forward, there is a clear intent that forgiveness of sins is associated with water baptism.
I would also add that in the Great Commission of Matthew 28, Jesus gave the command to "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age," It is important to undestand the Greek grammar that Jesus employed in that statement. the words "baptizing" and "teaching" are adverbial participials modifying the only active imperative, i.e., make disciples, in the sentence. They are not instructive verbs telling what is to be done; rather they are the means of making disciples.
It is comparable to a statement that I might make to a auto mechanic telling him to "service my pickup, changing the oil and filter and checking all the fluid levels in the engine".
Thus baptizing and teaching is precisely the process whereby disciples are made. You can ignore Jesus' instructions concerning the making of new disciples if you wish; however, I would not advise it.