Who are these Rabbonim who allegedly allow this? Why nobody heard of this heter before this breach had begun? It looks like first comes the tuyva, then heterim get invented.
Nobody meant to equate not-tsniusdic skirts with murder. What was meant is that having yetser horah is not a valid excuse.
By the way, the main reason for tsnius is because of the men. Stoping others from doing aveiros (such as protesting against women wearing immodest clothing) is everybody’s business according to the Torah.