Weakness OR fragility both, could be applied to physical or mental/emotional conditions.
I’d prefer to be physically weak rather than emotionally fragile any day of the week. lol
There is no shame in not having an ultra strong body, not everyone can or will be physically strong or robust, but, to be overly emotionally fragile is a much bigger liability IMO.
It’s much easier to strengthen ones physical body than to fix a messed up psyche. lol