I disagree with having racing stuff so fragile that ""Ideally", a properly optimized race vehichle - of any kind - should fall apart/be all used up moments after crossing the finish line." CampyBob...UNLESS...those types of fragile bikes are for professional racing only, and they would never be sold to the general public for use, in this way it would be the same as NASCAR.
I remember when NASCAR was stock car racing, that meant that in order for a car to qualify to race NASCAR that car manufacturer had to make at least 1,000 (can't recall the exact number, maybe it was 1,200?) limited production cars to be sold to the general public that had the exact same chassis, suspension (I think shocks could be changed to handle the demands of oval bank racing) and mechanicals as that which was going to be used for racing, the only differences was the interior was gutted and safety stuff installed, wheels changed to race safe wheels and tires changed to racing only tires (racing only tires were illegal for street use back in those days as they are to this day), headlights could be removed and air intakes installed in their place, otherwise the cars could not be modified from its original factory configuration. Nascar has since evolved (in a direction I do not like, I liked the old ways better) into what a car being used in NASCAR is nothing like what you can buy from the factory.
So as much as I would hate to see pro cycling go in the same direction as NASCAR, but if that's what they want is fragile race only stuff then that stuff, be it frames, wheels, whatever, can only be sold to pro race teams and destroyed or sent back to the manufacture after it's intended purpose is finished, and we the general public would not be able to buy such bikes and components.
Otherwise if they don't make pro cycling specific bikes and components only then they have to make bikes that can withstand the rigors of the average person banging it down rough streets for many years.
Yes, I know you'll start screaming about other types of racers that aren't pro but they race so shouldn't they be privy to such bikes? NO! They can race on something that is similar but bikes and components have to be made stronger then the pro race versions to handle daily riding on rough surface streets without the possibility of endangering the rider.