Originally Posted by Wogsterca

Nobody else has said this, so I will, a curved fork tends to increase the fork rake, and as you increase the rake, the front wheel becomes more and more likely to self-centre, making for fewer wheel adjustments to maintain a straight tracking. This is because the weight load on the front wheel is behind the wheel, to a lesser degree you will see the same thing on items, like shopping carts that have offset wheels.

Originally Posted by Wogsterca

That would be true for road bikes, however most shock type MTB forks do absorb some vibration. I think the biggest reason for road vibration causing problems is tire pressure. If you have a 23mm wide tire inflated to 120PSI, and you have a lot of problems with road buzz, then try a little lower pressure on the front tire, say 95-105PSI, see if that helps. The biggest advantage to the pneumatic tire is that it effectively acts as an air shock, inflating the tire until it's as hard as a solid tire, eliminates that advantage.

Racers need it, because they need every last drop of speed, because often the difference between the winner and 4th place is a few seconds at best. Comfort is of little concern to the racer, especially when the cost of that comfort is speed.

If your riding 75km a day on tour then whether you finish the ride at 2:30PM or 3:30PM is often immaterial, so you don't need those super high pressures.