If there was no demand for it, i.e. if nobody downloaded it (if only) it would not exist, so the downloading is fundamental to its existence. It is rarely if ever innocent and so-called "innocent" viewers must realise and be made to realise they are contributing to this nauseating form of child abuse. It's not the sort of thing you do by accident.
Only once ever, as a Samaritan, did I meet someone who claimed his downloading was entirely innocent for the purpose of a dissertation for his training as a social worker. When he told me, it was because he realised, possibly too late, that the act itself had the potential to be the end of his future career.