No, totally scriptural, inspired, and inspiring
Do you think the Sinner's Prayer is scriptural ? Which one?
All the ones that are not quoting texts in Scripture, eg., Billy Graham, Joel Osteen, etc.
Examples from Luke 18 and Matthew 8 are approved.
And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner. I tell you, this man went down to his house justified rather than the other: for every one that exalteth himself shall be abased; and he that humbleth himself shall be exalted.
Lord, I am not worthy that thou shouldest come under my roof: but speak the word only, and my servant shall be healed.
See what i wrote above, and rather than asking imprecise questions, tell me what your argument is that they or some of them are not Scriptural.