Inquiry: Aren't Vulkans canonically even more emotional than Humans, but due to using certain kind of meditation and mindset alongside cultural... oppression let's just say, they often appear as they are not swayed by their own emotions?

Yes, as you can see this through how emotional (and paranoid) Romulans are. Also Frieren shows a decent amount of emotions, like her obvious annoyance when doing things she considers tedious to her, her over eagerness on looking through "treasure," or even her enthusiasm on collecting fake grimoires attributed to her mentor.

If Frieren was in Spock's position, she wouldn't advocate for Kirk to sign peace treaties with the Klingons, she would've drove Enterprise to Qo'noS herself and detonated the Genesis Device. And Agent Sloan (or whoever was in charge of Section 31 in late 22th Century) would have called her boss.

"How can there be war crimes if there is no war???" --- Gul Darhe'el Frieren, probably