One reason I think most of the cleaners don’t care about life on the sphere is because it’s so unattainable for 99.99% of them plus the ground is their birthplace and home.
Imagine you had your life now, with all its pros and cons, then someone came from the moon and said there is a perfect city on it, are you going to drop everything to learn about or even try to go there ?
Plus the added difficulty of getting to the moon solo/with random people