I’ll throw out a couple guesses, even though I don’t know the answer. The academic prestige you gain probably would not make up for the fact that most people would need to quit their current nursing job and relocate to attend one of those universities. Most metropolitan areas have at least one excellent local graduate nursing program where you can attend part-time, and hopefully get your employer to help pay for it.
Also, graduate tuition varies greatly among schools, and often varies from what the same college charges undergrads. Often there is little need-based aid for many types of graduate education.
Someone might say that a prestigious university would be useful if you want to teach nurses. However, there is shortage of nurse educators, and I think most nursing colleges would be more interested in your ability to work with students. The exception would be for nurse researchers at large research universities, but that is not a huge field.
Post-bachelors certifications are valuable, but you don’t need to go to Columbia to earn them. After you earn those certifications or degrees, few people are going to ask where you went to school.