I don’t think culture has any idea of modesty at all: by which I mean not so much that people are
intentionally immodest, but that they simply don’t know that modesty exists (they are “amodest” ??) I do, however, think people know when they are wearing “sexy” clothing; i.e. clothing that they intend to wear in order to flaunt certain areas of their bodies. And I don’t think this is the norm.
Further, I think it’s easy living in California (I was born there and lived there for over 20 years) to get a skewed idea of what is the norm. Clothing standards are always more relaxed in temperate climates. I can tell you that midriff baring clothing is
not the norm out here in the east.
(In fact clothing out here is so much more formal, I continually feel shabby-- what, you mean the fact that my outfit matches isn’t enough

?)
I think a decent response to the lack of standards in society is to wear ordinary clothes that simply don’t flaunt those areas of the body used to sell sex. No showing off your breasts, thighs, midriff, or pubic area and nothing see-through or skin tight.
I hope this will not become the norm. But if it does, I think that will happen because the society will have lost all moral standards.
Obviously, as Catholics (and patriots!) we want to stop this decline. But the most effective means to do so is by living an openly moral life.
I understand that Colleen Hammond, et. al. are desperately trying to regain what they feel we have “lost” in society in the last 40 years or so. (Frankly, I think what we lost was a sense of discipline in society, but there would’ve been no way to stop that with the acceptance of contraception.) But I think
insisting that all women return to a standard of dress that has become impractical is a rational or effective response.
In fact, I think, by
insisting, people like Mrs. Hammond and the priest in the OP do more harm than good and put emphasis in the wrong place (on particular items of clothing.) (Not to mention that what they say is outside the bounds of Church teaching.)
I think it is (at least I have found this to be the case in my life) the people who practice modesty… modestly

… quietly, and within the bounds of the ordinary, who do the most good and are the most effective.
Yes, but only is so far as it wouldn’t interfere with my attempts to live a balanced, holy life. You cannot anticipate someone else’s reaction to you to the extent, that it interferes with your own attempts to follow God’s will.
Frankly, as a single woman without a car, on a limited income, living in a dangerous part of town, following Mrs. Hammond’s teachings would interfere inappropriately with my life. (But I think placing that much emphasis on clothing is inappropriate, anyway…)
Here I will wholeheartedly agree with you!