I believe repression can exist for any type. Isn't that what the inferior function is all about? Fe in the inferior leads to the repression of social values, mainly of a feeling of being a socially responsible individual, or better, as a citizen defined as an individual considered in the context of a community with rules, values, and traditions for each individual to follow. As Ti-dominant, I question their logic and their necessity in a skeptical fashion, and I question their value for me. But then the question is, what motivates this skepticism? That would depend on the individual, but for me the real, hard-nosed skepticism began in early adolescence via some disappointing circumstances.
The enneagram is more useful in rooting out the source of the motivations as it is primarily concerned with motivation in general. As a triple withdrawn type, my tritype is 549. So, considering the average to unhealthy levels of development, we know that 5 is the socially withdrawn type anyway, so its abilities in the social realm are in the primitive or immature range. The 4, as a dependent type, has a feeling of needing to be taken care of by having needs met by others, and of being exempt from and even above the laws of nature (the archetypical Starving Artist). The 9, as another dependent type, is profoundly neglectful of the human need to be assertive, represses anger, and becomes passive-aggressive as a result.