Pike went to Johnny Bravo’s barber off screen.
Do you think the humans acting all “logical” is psychosomatic? They’re less aware of the cultural history that lead to Vulcans suppressing their emotions and acting logical, so they think that logic is more of a racial trait, and thus act logical.
There is a bit of a precedent of logic being genetically encoded with Star Trek Prodigy when
spoiler
Dal
acted more logical upon
spoiler
activating his Vulcan genes
.
Turns out Voyager also established an area of the Vulcan brain that’s responsible for suppressing emotions:
EMH: There’s a definite neurochemical imbalance in the mesiofrontal cortex.
JANEWAY: Which means what?
EMH: That’s where the Vulcan psycho-suppression systems are located. This may be the result of an incompatibility with the Betazoid telepathic neural centre, I’m not sure.
In this case, I’m wondering if, since Spock is the origin of the serum, the crew are somehow reflecting his self-doubts.
Last season’s Charades also supports the genetically encoded notion. Which goes against everything we know about Vulcans, but makes for fun comedic episodes, so they’re probably going to just keep doing it. Psychosomatic is as good an explanation as any.