Originally Posted by
Dave Mayer
With clinchers, the shape of the tire is very much influenced by the rim width; you need fatter tires and rims to not only maintain the tire shape, but to prevent pinch flats. Again, you don't get pinch flats on tubulars. You can ride them at irresponsibly low pressure and have little risk of pinch flatting or even damaging the rims.
I have damaged a carbon tubular rim on a relatively small bump. That was with normal tyre pressure as well.
Many of the points you made have some truth to them but certainly not as much as you make out.