Agreed. I'm guessing this is one of those 'myths' that Humanity has about Vulcans and the Vulcans just play completely into it to have an advantage. But the longer a human works with a Vulcan, the sooner they realize that it's utter bullshit and that most Vulcans are a bunch of lying emotional sluts

I mean they're not even bound to tell the truth like the Aes Sedai, who anyway manage to deceive plenty. Plus even if Vulcans had some kind of instinct to only tell the truth, Spock is part human.