the general tendency to use indirect objects for people is intensified when the impersonal "se" is used instead of a real subject. this is to avoid the misinterpretation of the "se" as being an indirect object pronoun. hence some speakers say "se le lee mucho" "people read him/her a lot" if ""se"" means "people" and ""le"" means "him/her", and reserve "se lo/la lee mucho" "he/she reads it a lot for him/her" for sentences in which the ""se"" is not impersonal.