10/10 therapists agree! sexually molested children becoming emotionally and psychologically scarred.
The manga's message is wrong.
And yeah, you take children away from parents or family who sexually molest them. By the time the child is old enough to properly understand (and usually before that), they'll be grateful.
Of course, Rin is an impossible character that the mangaka dreamed up, and not an actual child. Because actual children do not respond that way to molestation.