Things are not always so clear cut, what about images that are completely fantasy, that are images that are computer generated, that in reality no children are involved. What about text descriptions with no images at all? Should people be subjected to jail for merely having a bit of text in their possession?
I have no problem jailing people for what they actually do. I am not comfortable with the idea of the government jailing people for having images, merely be cause of the slippery slope and all that.
In this case, yes they are.
If you want to defend someone going to jail for having fictional text descriptions on his computer, you have to find someone going to jail for having fictional text descriptions on his computer.
And if you should find one, I suspect you would also find a lot more people supporting your position on this board.