Those are sound assumptions.
1. The Rav is the one who customarily gives divrei Torah in a shul- that’s called kavod harav.
2. A minyan generally gives the honor of a speech to its rav or Mara d’asra, since he is knowledgeable and can address them.
3. I’m certain you are frum. You make fun of YCT. A frum shul as the one you go to wouldn’t have someone not frum speak- it makes no sense.
4. You said yourself you do it to disrespect the speaker.
These are not insane assumptions to make, be serious.