[restornu]

....I have more to boast of than ever any man had. I am the only man that has ever been able to keep a whole church together since the days of Adam

The operative word is MAN!

It was because Joseph Smith had faith in the Lord Jesus Christ and exercised what Jesus taught to those who have faith!

Matt. 17: 20.
20 And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.

[aMorePerfectUnion]

“....I have more to boast of than ever any man had. I am the only man that has ever been able to keep a whole church together since the days of Adam”

Pride. Arrogance. The same thing that led to the fall of
Satan.

[Godzilla]

20 And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.

Maybe that is how mormon apologists moved Hill Coumorah from New York to some obscure site in Central America (and Indonesia, and elsewhere).