Do you have anything credible that suggests the LDS religion member's have different beliefs because there is no professional clergy?
As opposed to your credible "opinion?" That is literally what you've based your statements on.
My opinion is also based on personal observation as well as judgments about the structure of the church. I don't think it's much of a stretch to say that the method in which Catholics choose their priests (i.e. through a formalized seminary in which the organization trains all of its clergy to teach the same things) is going to lead to greater harmonization than the pretty haphazard way that the LDS church chooses bishops, stake leaders, and other other leaders who are the immediate point of contact. The same is true of all churchs with formalized clergy training.
Obviously I would think that it's more harmonious in terms of its beliefs than some other faiths that are more decentralized than the LDS church like the Independent baptists and such.