And that has no power to compel somebody who doesn’t have a personal conviction that the church is true.
So; you've just said it DOES have POWER TO COMPEL certain individuals!
Let's discuss the fact that unless a member has paid his tithing in an amount satisfactory to his bishop, he will be refused a "Temple Recommend"...and thus in mormon belief unable to fulfill his "worthiness" requirement to reach "exaltation" by taking part in man made temple covenants. He is then found to not be satisfactory to God.
Mormons can defend the tithing practices of the sect until the cows come home, but IMO if one is deprived of salvation because his offering does not satisfy a MAN, there is a clear indication that the mormon church has taken the Biblical view of tithing and totally corrupted it.