moq and mdd: The Chazon Ish was asked whether nowadays it is possible to consider slacks as not such a forbidden garment, since so many women wear them. To this the Chazon Ish responded that in spite it being worn by many, it is absolute pritzus to walk around in such a garment, adding that he was convinced if at the time of the Sanhedrin a woman would have appeared in public in slacks, she would have been brought to Beis Din and stoned for behaving with gross indecency. See Orchos Rabbeinu, Vol. One, page 226.
[The Orchos Rabbeinu was authored by Hagoan Harav Avraham Horowitz, chavrusa of and talmid muvhak of the Steipler Gaon as well as very close to the Chazon Ish. His father-in-law is Rav Chaim Yehuda Leib Auerbach, father of Rav Shlomo Zalman Auerbach. Rav Avraham also authored the halachic seforim “Devar Halacha”.]
moq, the gemorahs you cited causing death for things like teaching a posuk wrong, are divine punishments. Here we are talking about punishment by the Court (Beis Din).