Source: played a bunch of Kerbal space program
Antarctica is huge (1.5x the area of the US), it would be a dangerous logistical nightmare to fly the sorts of patterns you need to capture aerial imagery there, and it's almost entirely covered in non-descript ice -- what would be the value of having high-resolution imagery there?
We don't. State of the art imaging satellites are in ballpark of 20cm/px.
Here is what antarctica looks from a satellite: https://space-solutions.airbus.com/resources/satellite-image...