To me, the most unbelievable part of Star Trek is not the fact that humanity comes together in a post-scarcity society or there are thousands of sentient and non-sentient lifeforms in the universe. It's that all civilizations somehow developed communication mediums that connect with each other easily
The Vulcan one is a featureless gray sphere with a slight flat spot so it doesn't roll. Nobody has any idea how to use it. When asked, Vulcans will respond either implicitly or explicitly that it's obvious and your question makes no sense.