Many "scholars" even use the term BELIEVER'S BAPTISM because they don't know the old wool over the eyes trick.
Believer's baptism is actually an ancient form of initiation into pagan mystery cults. For instance the pipers wanted Jesus to sing or lament and dance as they piped.. After the INITIATION where "prophecy" or music induce madness was the purifying or purging power (Apollo, Abaddon is called the WASHER), then you washed away the results of inition. Jesus refused it and got killed.
That is used to say that one is SAVED either by predestination or by FAITH ONLY. After they are saved BY FAITH only, then they go through a long period of study to make them worthy of full membership in the church: withoug baptism the Baptist system (is or was) that you did not observe communion or participate in any "liturgical" work UNTIL you were voted on and THEN you were worthy of being baptized.
I questioned a local Baptist lady and she says that it is not as obvert but that is still the agenda.
On the other hand, the prophecy of Isaiah which the eunuch understood, and the Arche or founding act of the Gospel by Mark quoting Malachi is that if you BELIEVE then you have the ability to be saved but you are NOT saved. The commands, bible examples and historical practice was that repentance followed by baptism FOR (in order) the remission of sins and only then would you have the gift of A (personal) holy spirit.
They get by with saying that they are baptized BECAUSE their sins have been remitted and they are saved. However, the word EIS is never in any sense used to mean BECAUSE OF but into, unto or FOR THE PURPOSE of entering something.
Catholics and Calvinists SPRINKLE as "baptismal regeneration" but the Church of Christ is the only group whose baptism is is FOR THE REMISSION OF SINS. Or "arise and be baptized and wash away thy sins, calling on the name of the Lord." Or Baptism SAVED because it is OUR request for A good conscience which is the same as A holy spirit (1 Peter 3:21).
Everyone but the church of Christ makes a major industry out of telling Jesus, the Apostles, the prophets and the historic understanding all liars.
Baptism is not a punched ticket on the joy buss to heaven but to BECOME a disciple or student of Christ. The people understood that from proselyte baptism or commercial (apprentice or disciplship) baptism. No one let you grasp the mysteries until after baptism: so says Paul in 2 Cor 3.