Salvation through Jesus?

Helaman 14:8; “And it shall come to pass that whosoever shall believe on the Son of God, the same shall have everlasting life.”

2 Nephi 25:23; “For we labor diligently to write, to persuade our children, and also our brethren, to believe in Christ, and to be reconciled to God; for we know that it is by grace that we are saved, after all we can do.”

Why can’t they tell the truth? It’d make things so much easier for them and all of us!