Women are too kind, one day we will have properly autistic women who have no emotion towards others besides those in their own family. Then the white race shall be saved.
Also, on a slightly more serious note, not only is Pippa unknowingly playing into the sperg's desires but he's also playing into them himself. For him the attention is valuable and he's probably gotten more attention from his oshi than anyone else at little to no cost comparatively, but that attention is just pity and can never really be anything more. It's almost like some kind of monkey paw wish between them, Pippa gets to save someone and feel less guilt (I still don't get why she thinks she's a bad person), but she's saving someone who will never improve, and Henry gets all the attention that he wants but he's regarded as a dying houseplant more than person, so the goal of that attention will never amount to anything actually valuable.