You know, with all the blame and all the aitzah… etc.
I know that one of the reasons women and girls are dressing not b’tznius is because, pashut, it is just hard to find in stores. In Jewish place and elsewhere, the styles have just overtaken except for maybe a few stores in BP that sell any decent clothing for an absolute unaffordable fortune. But Girls like to feel good about the way they look. IT”S NOT ALWAYS L”HACHIS when there is a lack of tznius or “gray area” sensitivities. It’s just what is available and what you get used to.
When I first saw the capsleeve/ longsleeve style I thought it looked very not refined and I felt like you could see too much the way girls were wearing the shells. But guess what?!? I barely notice it anymore. It’s what the stores sell. And so either you get it or like me you search hi and low till you find something decent and nice for an affordable price.