Something apparently above your pay grade.
What is the rationale of taking the vows of a nun? Any vows?
Well, it's obviously above your pay level. Do your own research. A novice is not a nun, women who choose to belong to any order are referred to as novitiates. They enter a Convent, study, reflect, are evaluated, educated in many areas, languages, science, math, literature, nursing, geriatric care as well as other vocations for which they may have talent.
Once again, these women make a career choice, and choose to help others with little expectation of getting rich. I'm not sure why they devote their lives to helping others.
Oh, pardon me, you obviously know the answer, and I went ahead with my explanation. Please, attempt to educate the masses with your notions.