The illustrator before doing dear Benjamin did some doujinshis about kids (probably less than 15y) p*rn. And bcs of that, they are having problems with the situation, so they can't draw dear Benjamin while the whole thing is not totally resolved. This is what I did understand, but there can be something else I did forget.
P.s. sorry if there is something you can't understand. English is not my original language (ー_ー゛).