A holga does not have the same manual controls as (D)SLR and therefore they're non-comparable.
The results you get from these medium format films are entirely different from manual cameras because of their make up, making absolute control over your images impossible, therefore they are not used by professionals.
I'm assuming you know what a Lomography is so you're equipped to have this discussion.
I some how knew my request to take some 'snaps' wouldn't be a straightforward one.
Fixed :p