Are these a problem for people on the spectrum? Its says in en.wikipedia.org/.../Parable :
The defining characteristic of the parable is the presence of a subtext suggesting how a person should behave or what he should believe. Aside from providing guidance and suggestions for proper conduct in one's life, parables frequently use metaphorical language which allows people to more easily discuss difficult or complex ideas. Parables express an abstract argument by means of using a concrete narrative which is easily understood.
Years ago in religious education class at school we were told the Allegory of the long spoons en.wikipedia.org/.../Allegory_of_the_long_spoons.
We had to write about it. I got bad marks for saying " Why would the bad people be stupid enough not to feed each other?" I wasn't really thinking of any abstract or hidden meaning.
Intellectually I understand parables, but I find I take such things primarily at face-value, meaning that despite my intellectual understanding of the subtext, I seem to just take on board the story itself and get caught up in the details of the story. The latter seem more important than the subtext.