True, but that was an extraordinary circumstance, because the thief had no opportunity to get baptized.
You’ve got to be careful not to make rules covering everyday situations based on such extraordinary circumstances. It could well be that God forgives a requirement for those who can’t fulfill it, but holds the rest of us to it.
so, there isn’t any true spiritual significance to water baptism...nor it is a requirement. However, Baptism of the Holy Ghost is mentioned yet the evidence is speaking in tongues yet a lot of people debunk that... yet it is biblical and evident today