1. Acts 10:47 in the original (Greek) does not read, "Not the water, forbid". The ASV translates this verse correctly and very close to literally: "
Can any man forbid the water, that these should not be baptized, who have received the Holy Spirit as well as we?"
2. Jesus taught the disciples to make disciples and baptize them into the name of the Father and of the Son and of the Holy Spirit:. You cannot do anything "spiritual" to someone else. Quite clearly He was commissioning them and commanding them to baptize converts with water.
3. After the ascension of Christ, the book of Acts records many examples of converts being baptized with water, e.g.,
Acts 8:35-39 (ASV) "And Philip opened his mouth, and beginning from this Scripture, preached unto him Jesus. And as they went on the way, they came unto a certain water; and the eunuch saith, Behold, [here is] water; what doth hinder me to be baptized? [And Philip said, If thou believest with all thy heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God.] And he commanded the chariot to stand still: and they both went down into the water, both Philip and the eunuch, and he baptized him. And when they came up out of the water, the Spirit of the Lord caught away Philip; and the eunuch saw him no more, for he went on his way rejoicing."
There are too many examples to list here, but even a grade school student could conclude just from the book of Acts, that water baptism was practiced throughout Christendom.
4. With a few rare exceptions held by fringe individuals and groups, the overwhelming majority of professed Christian churches have held and practiced water baptism, which they have included in their confessions of faith and catechisms.
It sounds like this person has adopted some form of hyper-Dispensationalism or some other nonsensical system.