The message of “I Believe” cannot be easily misunderstood: Mormons are nice, lovable, gullible, naïve buffoons who–God bless their incorrigible hearts–cling to hilariously preposterous beliefs for which they can provide no sort of rational justification, and so they “just believe” their farcical religion as a sort of coping mechanism to deal with harsh challenges in life (all the while blissfully unaware that non-Mormons are laughing themselves to stitches over how ludicrous Mormonism is). “But hey,” the musical essentially says, “these affable idiots are still alright, since they are so sincere and unspoiled by this cynical, grown-up, adult world.”
Do you just believe (since there is fundamentally no actual evidence) that the God Elohim has a Father and his Father does also?
Do you just believe (because there is fundamentally no actual evidence) that God is eternally married and that human spirits are his actual and literal children?
Do you just believe (because there is fundamentally no actual evidence) that God used to live on an earth as a man before he was actually God?
Do you just believe (because there is actually no evidence) that a literal council of heaven occurred with embodied Gods and unembodied spirits before there was a physical cosmos?
And these mere 4 of many I could come up with, are only a few of the reasons I think the musical is entirely correct. Mormons actually believe in their version of the Gods and God without any actual evidence whatsoever anywhere for anyone to see, learn from, and come to know themselves.
In fact, I am more than sure myriads of other posters here can come up with myriads of other issues that Mormons merely believe because they are told it is true, and of which there is no actual evidence we can sink our teeth into. It is educationally interesting to see that bothers some Mormons. Who is to blame for this sorry state of affairs other than this is the way the leaders have given Mormonism to its own masses? When have you ever heard General Authorities in General Conference actually give evidences and reasons to believe in the more preposterous stuff?