She jsnt interested in changing things for the better or helping people broadly (that would be chaotic good) but she is happy to help those in her friend circle
The key is when she essentially says to her Maid Lilly "the class system is ridiculous but since I have money and a title I dont see why I and my friends cant turn that into indolent comfort. Just act subservient around other people then we pamper ourselves."
End of the book she has improved her social position via manipulation and being discrete. Sure she brought down a criminal conspiracy but she did it as a side hustle and parlays her discretion into greater wealth and comfort