I spent half my life on diggers .will you agree that some ground compacts a lot more that other and some land compacts very litle
Actually, sandy soils can compact very badly, but you can't see the damage you are doing. I once went out with an EA inspector (and soil guru) and had a look at maize stubble field that was so sandy it could've been a beach. Very little damage on the surface (despite being harvested in the winter 2015) but once you dug down there were serious compaction problems. which was leading to serious problems with soil moving downhill and was very noticeable later, in the following crop.
Clayey soils, at least, keep you off the field when you might cause damage, and are generally easier to rectify with a subsoiler.