Not at all. 100% truth. There is too much lack of knowledge for me to muddy the waters. I am giving answers that no one has.
I have not had one of these issues on any of the systems that I have fixed. When properly peaked (and they must be, due to the marginal amount of signal that is available) they work without any sound issues and/or picture quality issues. Unfortunately, if you don't have your dish at "perfect peak", for lack of a better term, you are compromising some portion of the signal.
Yes, even volume can be affected by signal quality (which is the measure of the signal-to-noise ratio, which is the amount of signal (signal strength) vs. the noise in the system.) This is not taught to installers. If it were, Dish would have a far greater responsibility to their customers and would be losing money on free service calls.
Well over 90% of service calls are generated at install. Proper education would eliminate the vast majority.