Joseph Smith was a glass-looker. It was a disreputable practice in his day and it is disreputable now. Would any currently active Latter-day Saint hire Joseph Smith to look for treasure on their property were he miraculously available for such service? A few might, but most are too smart to fall for such chicanery. I don't think it's a stretch to say that Smith's "slippery treasure" claim wasn't true. He wasn't trustworthy in that claim, so why should his claim that an angel retrieved the gold plates be trusted? Somehow those gold plates disappeared without a trace, just like the treasure on the land of the farmers Smith bamboozled.
Smith was involved in the Kirtland banking fiasco. He ran from authorities when legal action was taken against him.
Smith publicly lied about polygamy.
Smith secretly married women who were already married to other men.
Smith began translating the Kinderhook plates, which were no more than decoys set as a trap to expose him as a fraud.
The above few examples are more than enough to render Smith completely untrustworthy. It seems unwise to believe his claim that he was a prophet of God when it is clear he engaged in a pattern of dishonest behavior.
Mormons hold the Bible to be the Word of God, as long as it is translated correctly. I believe they, as do most people, find Luke 16.10 reliable advice. I don't wish to rip the verse from its context; however, I think it applicable to my point:
10 One who is faithful in a very little is also faithful in much, and one who is dishonest in a very little is also dishonest in much.
Most of us believe it important to be a man or woman of one's word. Most of us have learned through experience not to trust those who show themselves untrustworthy or unreliable. Should Joseph Smith be held to lower standards than the average man? Why should Joseph Smith be trusted?
KA