Would you expect inselbergs to form in areas where little to no erosion occurs over time

The correct answer is - No.

The inselbergs do not form at places where there's little to no erosion, on the contrary, they form at places where there is higher levels of erosion.

This geographic features can be found in warm and drier areas, where the erosion levels are higher, mostly having an erosion caused by the wind, an eolic erosion.

The inselbergs are isolated small mountains, rock hills, knobs, or ridges that are sticking out in the surrounding area. Usually they are in the middle of totally flat or relatively flat surroundings, being the dominant feature in the area.

They are made out of harder igneous rocks, so when the erosion removes the softer sedimentary rocks in the surrounding area, they stick out as they are much more resistant to the erosion.