Its the shape of door edges that cause the worse damage, especially back doors where the shape of the door where it goes over the rear wheelarch forms a point when the door is opened, hence my aversion to parking beside cars that look like they contain children.+

Rubbing strips have become part of the look of the car so no longer are they sensible rubber strips, they are now painted plastic, probably no cheaper to paint or fix than the door itself.

Could also be because rubbing strips increase drag by a fraction of a percent and every little helps in minimising the CO2 emissions thrown up by the unrealistic test regime. Door handles are now mostly flush fitting for the same reason, as are radio aerials etc.