Nev,
“I don’t think anyone here has denied that if an individual wants to hold by the machmir shittah, it’s a good thing.”
Agreed, however, that will be true if that individual is Machmir on each and every Halcha were it is states “Baal Nefesh” should be Yotza all.
And last time I checked, i don’t recall women to follow that rule at all, so why when it comes to Eruvin are some so obsessed with “baal Nefesh” leHachmir?
Even the Brisker’s allow the women to carry in Jerusalem…