The Robin’s ‘delicacy’ always reminds me of Mr Woodhouse in Jane Austen’s Emma, endless fuss over someone who appears in fact appears perfectly healthy! Or at least there never seems any concrete evidence to the contrary.
I get that her ‘delicacy’ is mostly for plot purposes (to give us an ongoing personal, tug-at-the-heartstrings connection between Joey and the San, and heighten the jeopardy of things like getting stuck out on the Stubai glacier overnight), but it cracks me up slightly that Jem ‘forbids’ Robin from doing settlement work after Oxford because it’s too taxing for a delicate girl, but immediately afterwards EBD sees no issue with her becoming a nun at a time when that would have required robust good health!
Canon law is very clear on postulants needing to be able to ‘bear the burdens of religious life’ (which would involve long periods of standing and kneeling in unheated spaces, fasting, limited rest and sleep, mandatory physical labour etc) and obviously no community living in close quarters wants to run the risk of a contagious disease like TB devastating an entire convent
Potential postulants would have been carefully screened and required a medical clearance before being admitted, and if a postulant couldn’t physically cope with the rigours of convent life, she’d have been sent back to the world before making her novice’s vows.
But Jem was also clear that Robin shouldn’t marry, so I suppose for EBD that left either becoming a nun or a CS mistress or some kind of mother’s help duties at Freudesheim!