Yeah, it's just so...what a weird juxtaposition with those two. I guess because JKR considers it a good quality to be able to love someone, but I don't know what to make of the reversals, because she it's so clear who the "inherently good" people are here. Lily, obviously. If Snape had just become more a fool for love there he might have saved himself because he'd have thrown away his moral compass and taken her own. Instead he bizarrely thinks being a DE will win her love. Dumbledore the good one could only lower himself and learn never to do that again. Well, actually both of them decide never to do that again. Since they'd both already graduated high school I guess they knew Lily and Gellert had to be their one true loves.