I'd hope the dolly wouldn't weigh 300kg, I'd hope for something more in the range of 150kg but I see your point and it's very valid. They're certainly not for everybody but with carrying large, awkward heavy items (ie square bailers), it's sometimes impossible to get the a safe ballweight and often desirable to load, unload and manoeuvre when not hitched up.
Dead weight efficiency is very important with caravans, long distances, corrugations, variable road quality, fuel efficiency, safety etc.... These considerations are less important with utility trailers as chances are no matter what the envelope has already been pushed, pushed again, then just ripped wide open and thrown in the bin.
Reversing is another to add to the list of things that licensing should cover. It beggars belief how easy it is to get a car licence. The testing should cover every situation a car driver could reasonably be expected to encounter in a lifetime behind the wheel. 110km/h, difficult high speed merging, reversing a short-drawbar trailer, towing a max-weight nice long tandem trailer and then high-speed merge, high speed wet skidpan lose and regain control, dry loose gravel skidpan lose and regain control, long, tight-radius twisty sections of shoulder-less steep roads, repeat at night, repeat in a FWD and RWD vehicle to understand the difference, pass every section to pass the test, and watch the road toll drop.
But then again we all know the huge dangers of three point turns and reverse parallel parking on a lazy Sunday.
Dead weight efficiency is very important with caravans, long distances, corrugations, variable road quality, fuel efficiency, safety etc.... These considerations are less important with utility trailers as chances are no matter what the envelope has already been pushed, pushed again, then just ripped wide open and thrown in the bin.
Reversing is another to add to the list of things that licensing should cover. It beggars belief how easy it is to get a car licence. The testing should cover every situation a car driver could reasonably be expected to encounter in a lifetime behind the wheel. 110km/h, difficult high speed merging, reversing a short-drawbar trailer, towing a max-weight nice long tandem trailer and then high-speed merge, high speed wet skidpan lose and regain control, dry loose gravel skidpan lose and regain control, long, tight-radius twisty sections of shoulder-less steep roads, repeat at night, repeat in a FWD and RWD vehicle to understand the difference, pass every section to pass the test, and watch the road toll drop.
But then again we all know the huge dangers of three point turns and reverse parallel parking on a lazy Sunday.