This is true and a good reason to immerse, but it is still not a command to only use immersion. The idea of ritual washing has many biblical examples such asn pouring and yes, sprinkling. But no where is one mode described as the only valid mode. Even with the Ethiopian Eunuch it is unlikely that they came upon a pond by the road side, but probably some shallow pool. But again, the fullest image is immersion, but there are many places in the world where it is not even possible because of the shallowness of the rivers etc…
It’s pretty clear from the gospels that Jesus walked into the river for his baptism. We think it follows that he was immersed.
Depends how shallow it was. The OT images and inter-testimental images of converts to Judiaism had pouring. He could have walked in and had water poured over his head as well. The symobl of washing is not harmed and many people bathed this way.
Baptist churches recognize other denominations as Christian, and they’re happy to have other Christians participate all day long in all of their activities, but you cannot become a member of a Baptist church unless you are baptized by immersion. Membership is required for serving as teacher, or as a deacon, or for holding a position on the ruling council. Non-members are invited to serve, worship, study, play, etc, equally with members. You could attend a Baptist church for years and not know who are the members and who are not.
So what if one was baptized by immersion as a baby in an Orthodox, Eastern Catholic or Presbyterian Church? If that person grew up always believing in the Lord is that baptism valid, if not, why?