Thinks that if your going to spread the gospel then you should teach what the early church taught, which is Acts 2:38. The death burial and resurrection of the LORD JESUS the Christ. Anything other than that and your stepping away from what the very disciples taught.
JESUS gave Peter the keys to the Kingdom of Heaven, which was a revelation. In-turn, Peter used those keys to open the doorway of understanding for us on the day of Pentecost.
If JESUS gave those keys, knowing before hand what Peter would say, don't ya think that it is good enough for us as well? Or are we all more special than Peter?