] IMHO, Catherine is being praised by Jane for this. Not for ignorance itself, but there are definitely some things that are good to be ignorant of! I think putting IT alongside the sensible (except for novels!) and proper Catherine really shows how ridiculous IT is. Catherine has no idea what IT is doing, because she has never wasted time being false, coquettish, flighty, affected, etc.
Yes, we see again and again the bad habits of "Wordly" girls juxtaposed with the more "countrified" - as is described later. Note CM's love is constant and humble - slightly different to IT!!