It is my opinion that the nurse is perhaps looking for a heter.
Yes, i agree one should ask their own Rav whom they ask sheilos of.
We have to remember that some women who may be showing some hair or maybe wearing a fall are new to being frum and so they have a heter to take upon things step by step. Therefore, what’s accepted and permitted for one may be ossur for another.
There is a gemara of a woman who had very pious children and when asked why she merited to such, it is written that even the walls in her home never saw a hair.
Some of us may want to look cool when we are young and later realize the mistake and cover more of our hair.
A family member of mine, in her later years asked that all her hair be cut as she heard that when one in niftar a malach, angel comes and pulls out each hair one by one.