Why do some Jewish women shave their head?
Because its seen as immodest for a woman to have their hair free, its the domain of maidens. When a woman marries she is meant to cover her glory and only be seen by her husband.
Having your hair covered most of the day is not an easy thing to do, the hair gets matted, sweaty, and you can develop heat rash. Having a scarf on your head not much air gets to the scalp. Its very uncomfortable.
In hot climites your head gets very hot. 80% of body heat escapes from your head.
Many women that are religious shave thier heads because its cleaner, and far more comfortable.
Wigs I hate, and they have their own set of problems, but at least your feel clean and cool.
Many women in the past shaved their heads, then wore very light scarfs.
Its very individual.
My answer would not suit many in their Torah version, but I speak solely as a woman and past experience.