Realizing that we may be talking at cross purposes in the definition of community ... I'll ask this anyway.
Let us say for a moment that you live in a community where the normative dress for women is jeans and t-shirts is it respectful to dress in jeans and t-shirts? And thus showing pride to wear full-length skirts with long-sleeved blouses buttoned to the neck?
Is there not a risk of being prideful in our modesty?
Such traditional communities are very common, in my experience. It's very difficult to keep the faith when the entire world is so secular and degenerate in almost every aspect. Also, it's difficult to keep the faith in a truly vibrant manner when everyone around you is ideologically opposed to you. Living in a Catholic community can thus act as an important aid to salvation. These communities form naturally, as like-minded individuals desire to have more social intercourse with each other, and less with the world-at-large.
I don't know about the Indult, because I don't have experience with it, but I know that of the 3 SSPX chapels I have been very priveleged to attend, all three have been the nucleus of a quite close-knit community. In St. Mary's, this is manifested temporally, because the entire town seems and feels Catholic, due to the majority being trads. (Thus, the logic goes: skirts are the unquestioned rule there, in the largest traditional Catholic community/parish in the world, why shouldn't they be the rule everywhere else too?) Even smaller chapels in the midst of a large city can develop this sort of community life... trads gravitate towards each other, and certain businesses become owned and predominantly staffed by traditional Catholics. One's social life begins to revolve around the parish, and one finds that one doesn't associate with many people who aren't trads. Why associate with a bunch of secularists who couldn't care less about our Holy Religion, when you could associate with good Catholic friends instead?
Regarding pride... there is no more pride in holding oneself to a proper standard of dress (we'll leave aside for the moment what that standard is, since we disagree) than there is in practicing the true faith among infidels. The only place pride might come in is if the natives dress in a perfectly modest manner which also happens to befit Catholic decorum, and yet we don't adopt it... not for some good reason like our cultural heritage or something, but only because we despise the natives and take pride in our "not dressing like THEY do" or something. Anybody can have pride in anything that they do, for whatever reason. However, this can't be judged from exernals, but only God can know it, as it is on the internal forum. I might be dressed in sackcloth, but if I'm proud of my "humility"... no good. Similarly, I can be wearing a tuxedo to an evening wedding, but if I'm wearing it because I want to observe proper dress and decorum, then I am certainly committing no sin, and in fact, am acting virtuously, even if due to the deplorable culture of our times, I am overdressed, and everyone else at the wedding is in overalls. (Yes, I might feel very awkward, lol, but I'd be acting in accord with what is accounted proper, even if Farmer Joe next to me is woefully ignorant of this standard.)