Cheap shot. You can't win with this one. You know what would happen if they described the product in a vacuum? The top comment on the HN thread would be "Basically, it's like an X for Y."
If you need to make a connection with something you hope someone is familiar with in order to explain your product, you don't understand your product well enough.
If you can be described as X for Y, then you can make the argument that "it worked for the Z industry".
However if you can't be easily summed up as X for Y, you can claim that this is something completely new that's never been done before. And people like that...I think? I don't know, I'm rather new to this. What do you think?