Moses had a speech impediment. God doesnt choose what we think he should choose. His advice was sound.
Yes, Jehovah doesn't choose what we think he should choose, but does that mean we abandon all critical thinking? There is a huge difference between a speech impediment, which doesn't affect your thinking processes, and whatever is going on with Lett. There are a number of very good leaders and speakers in the organization, intelligent and well spoken, true believers (even if mislead, in my opinion), so why would Jehovah choose this clown over them?
There are many people joining lately who are here directly as a result of these videos, they can no longer believe in an organization that would choose this person as a leader, as there is obviously something very wrong with him. Seriously, what would it take for you to lose faith in the governing body if these videos do not do so? Does his overly animated expressions and simplistic speaking skills not bother you at all? What would it take to make you question things?