Quoting you at first: "In Malta and Turkey among others, we may be just seeing localised areas where nature has fortuitously revealed the tracks for us to observe today."
It is clear that among various parameters to discuss concerning real ancient history, geology and paleo-climates are key.
In the case of Malta, the problem with your assumption is that 90% of cart ruts are located on Coralline limestone layer, which is youger and harder whereas there are only a few onto Globigerina limestone layer, which is older and softer than Coralline. In Globigerina limestone areas, there are quite no cart ruts.
Why? I don't know. If I knew I could publish a best-seller book! :)
Indeed, we have no clear answer to the malta Cart Ruts riddle yet, but I think that Malta local reality contradicts your claim, even partially.
And in the case of "Clapham Junction", a site that I personnaly saw, it is unlikely to be a place "where nature has fortuitously revealed the tracks for us to observe today", because it is and clearly was a very old quarry, where I observed rows of man-made parallel cut benches that parallel cart ruts all crossed at a constant angle. An obvious example of "pre-industrial" production organization.
Please compare malta geological map with cart ruts distribution map hereunder:
Current topic, Mike D's answer to Harry Wolf, 25th November