So why do you not practice the same faith as Polycarp (disciple of the Apostle John) or Clement ( a disciple of Peter) or Ignatius (a disciple of Apostle John) or Irenaeus (student of Polycarp).
You realize by discounting these people is like me saying George Washington knew nothing about the Declaration of Independence; that I know better than he did and all I need is the Declaration of Independence to know everything about the american revolution.
Surely you see this is silly, but it is exactly what you do when you discount the Early Church Fathers and trade their views for your own.
That’s not it at all. It’s more a recognition that a lot can happen and change in one or two generations.
If you do not reduce salvation to the sinners prayer then, how is one saved? What else is involved.
Faith comes by hearing and hearing by the word of Christ. With faith there must be repentance, which is a complete turning away from sin. This is not a one time thing or event but a life of repentance. This is justification, the imputation of Christ’s righteousness.
As we continue in faith and repentance, yielding to the Holy Spirit and making use of the means of grace He has provided for us (the Scriptures, prayer, church fellowship, sacraments/ordinances) we experience the lifelong process of sanctification, which is the infused righteousness of Christ.
If faith and repentance cease, then salvation is lost.
Greg Laurie (harvest crusade) and Billy Graham would disagree with you, among many others. (Not that they are right).
I can’t speak for Billy Graham. I would be surprised if he thought all you had to do was pray a prayer and then you’d be saved. I think his soteriology would be more nuanced then that. I could be wrong though.
But I do know that Greg Laurie does not believe all you have to do be be saved is pray a prayer. He has spoken on the need to confess Jesus as lord, obey his commands, resist the devil by fleeing temptation and avoiding besetting sin, and work out your own salvation with fear and trembling.
I would also say you would be hard pressed to say American Culture has not highly influenced your theology, especially since these movements are founded in the American Enlightenment.
Much of evangelicalism has been a reaction against enlightenment thinking.