Short-term memory for you too. Who has Lesnar beaten that was so great? Herring, whom Fedor beat in his prime and stopped? Mir, who is 4-3 in his last 7 fights. Mir, who has been stopped from his back twice prior by Pe De Pano and Ian Freeman (and starched by Vera). 46-year-old Randy Couture, who was coming off over a year layoff (Randy with a crapload of losses). Not to mention some people say Randy won the first round against Lesnar.
People are impressed with the fact that Fedor hasn't had a legit loss in his whole career. Being 30-1 while fighting at a high level is a lot more impressive than being 4-1 and fighting at a high level.
Also, Carwin is no more accomplished in MMA than Rogers. Both have around 10 wins, and both had only beat 1 big name opponent. Rogers beat Arlovski in 22 seconds, and Carwin almost got KTFO by Gonzaga before KO'in him instead.
Lesnar should be chasing Fedor and begging him for a le shot, Fedor shouldn't have to chase anybody. He's the most accomplished heavyweight in MMA other than Nogueira (whom he beat twice).