i mean it's not that each of them did it it's that the sovreignty did it and everyone followed suit.it has less to do with myne having copied Royal mana, and more about her praying. myne is much more genuine whenever any gods are mentioned. the entire noble culture that references gods in daily speech is designed to be like a prayer. though its more like trying to get any particular gods attention.
hannalore was the same with how much she pray to the time goddess. same with the other first year girl.
despite how it looks but the average noble is less religious that you might think. i mean each of them turned their main church into a whore house.