I [size=78%]appreciate that the thread was raised about private US clubs, where perhaps caddies may be more readily available, but the subject seems to have drifted a little from this aspect.[/size]
So, a couple of general points -
Are we just discussing fit strong men here? What about ladies and seniors of both genders as these folk usually have less strength and thus less ability to carry.
Whilst it is probably true that many folk who use either a powered or push/pull trolley could carry a bag, could they carry for 18-holes 14 clubs, a few balls, waterproofs and an umbrella as well? I doubt all could. [size=78%]In addition, whether they could carry for all 18-holes and still play with the same frequency, ie number of rounds per week, as when using some kind of trolley is doubtful.[/size]
Greenkeepers I've discussed this matter with have all said it's the players feet not the trolley wheels, that cause most the wear and tear and winter muddiness.
Less play because folk can't carry is a potential outcome if folk arn't allowed trolleys, can't carry and no other alternative, like caddies or buggies are available ......... and less play ultimately means less revenue.
Quite a few UK courses are using rubber mesh imbedded into paths in busy areas like tee-to-fairway routes. These seem to provide grip, reduce muddiness and the grass grows through the mesh and can thus be cut with the usual mowers.
Atb