You would have a point, but having just scanned the text, I couldn't find anywhere that it says the images are hosted on Reddit. It says they were "posted to Reddit" which is ambiguous at worst, very far from the allegation you are making.
The text says the stolen images "appeared" on reddit, which reads as an accusation that reddit users or admins were directly embedding the stolen images in pages on reddit itself via CSS or the <img> tag.
The text also repeatedly clumps reddit together with 4chan and anon-ib, with the implication being that they are all sites capable of accepting direct image uploads.
