You are living in a dream if you think those folks will be swayed by halachah. “The Gedolim Say” is all they have to respond. “Das Torah” trumps halachah when it comes to preserving the chareidi lifestyle and power structure. Any halachic authority (regardless of his gadlus in Torah) who paskens otherwise is not a “gadol”, because his hashkafa is “wrong”, his mesora is “wrong”, and in their eyes is likely an apikorus or oved avoda zara. Although HKBH lives within the dalet amos of halacha, the chareidi world lives within the dalet amos of hashkafah.
