Traditional Catholics have their own cultural norms, this is because the general culture is in stark opposition to Catholic ways.
Yes, I think that is exactly right. Tele, I like that picture you posted. I think it does a good job of showing a traditional Christian (as opposed to Protestant) form of dress -- it is modest without being frumpy; the women are sufficiently covered while also maintaining a tasteful appearance.
Here is another one, depicting the national costumes of the Balearic Islands. I defy anybody to accuse the women of this Mediterranean culture of having dressed "frumpily"; then again, people seem to use that word in a wide variety of ways. I have a very clear image in my mind of what "frumpy" is (think of the picture of those fundamentalist Mormon women or the "Plain Catholic" website), but I do not find burqas to be frumpy either, only excessive, whereas others have told me that they do find burqas frumpy. Thus, I conclude that we should agree on a definition on this thread before proceeding further. Anyway, here is the photo :

I believe that is the Catholic way.
No, I think women are better off wearing "out of date" clothing than dressing immodestly.
Muslim women actually do tend to practice modesty. In that respect their natural virtue puts most Christians to shame. That so many have refused to go along with liberal secular dress merits great praise.
And they usually wear trousers.
I have lived around Mohammedans before and have been to Mohammedan countries; it seems like, unless they are wearing a burqa, the most popular and common thing to see on Mohammedan women is tight blue jeans and copious facial make-up, particularly around the eyes. And they dress in such form-fitting clothing despite covering their heads, which I find so silly -- a clear example of the letter killing the spirit of the law. I have an old friend who once saw a Turkish woman in hijab and jeans passionately kissing some man in a public park in Constantinople. Apparently, whatever the original point of the hijab was in Mohammedan countries, a large portion have forgotten it.
That being said, I lived around Mohammedans who immigrated to the US and Turkey is a saecularised country, so maybe these are not good samples, though Clare is in the UK and apparently has witnessed the same thing. Many of the women of the older generations (and some from the younger) dress in flowing robes, however, or full burqas. These are certainly modest and, amongst the Arabs I saw at Constantinople, sometimes quite elegant and beautiful in their own way.