Obviously, about this age is when their personality is budding, they start to become people, instead of infants who are completely new to the world and have NO concept of society, they are learning, seeing the world through other's eyes and not just looking for "fun" only. This is their most impressionable stage and not the time to corrupt (lack of another word, deal with it).
They're experimenting socially, they may show many quirky fun sides of themselves that make you go "haha, cute/funny/interesting" and after awhile, most people grow up and society kills that bubbly side to a person.
In anime, loli OR adult, generally those "pure" angles of a person, those quirky, base elements to a personality that are fun, are left intact, that's what makes anime/manga itself appealing, character-wise.
But for r/l girls, fucking with that pure, curious little mind, messing with it with sex and your testosterone filled action, will fuck them up. That's where the real sico lies in this predicament.
Lolicons to not really think of it in that way, nore that deeply, but i'm more willing to give them the benefit of the doubt than condemn them to the same status the real deal pedos out there, as they really are willing to hurt little girls whether they realise it or not.