Christ could not have made mere "acceptance" of Himself sufficient for salvation since the observance of some of the commandments is required by natural law. His plan included not only hope or "acceptance" but also the observance of the commandments, faith, baptism, etc.

"Not everyone who says to me 'Lord, Lord' shall enter the kingdom of heaven; but he who does the will of my Father in heaven shall enter the kingdom of heaven." St. Matt. 7:21