I think the issue is that IceTV cannot provide images with their guide, due to some old archaic laws and different copyright lawsuits they have been involved in. To provide them IceTV woudl need permission for each image, see post below which explains it.
There are people campaigning to try and fix these old laws https://www.faircopyright.org.au/
In saying that there are providers that have images, but my assumption is they probably cost more.

