I agree. They do not like it when their people tread their own path. While they try show they are a ‘perfect’ culture,, they are quite bigoted (see the way young Spock is treated in the Kelvin movies and the way they are portrayed in Enterprise, for example).Vulcan culture works most smoothly with a high degree on conformity.
While the Vulcans are one of the earliest aliens portrayed in the franchise and 3 of the major characters across the franchise have been Vulcan, the culture hasn’t been explored anywhere near as closely as the Klingons. The novels have covered a lot more ground. It’ll be interesting to see how future series portray the culture, as of the developments shown in Discovery.