Originally Posted by Prime Junta
'Oh Susan!' said Jill, 'she's interested in nothing now-a-days except nylons and lipstick and invitations. She always was a jolly sight too keen on being grown-up.'
Susan was condemned to perdition because she found out about boys.
I remember how I experienced it when I first read it around the age of 10 or 11, and it still reads the same way. Sophistry like the stuff you quoted won't change it: C.S. Lewis damned Susan, and his siblings and all the other characters never gave her a second thought.