“P.S. That is not to say I agree, but to explain why Rabbi Twerski’s points MAY not be valid in this case. Did he speak to the girls in question so that he knows their specific intent?”
I believe he specifically addressed this point towards the end of part II.
” Besides, since Rabbi Twerski is not their Rabbi, the girls (and SAR) have no Halachic imperative to agree with him”
No, but they are required to base their decision on competent halachic authority, which, by their own admission, they have not.