Oh please... top riders raced every single important race, there wasn't any specialization. Even Merckx told he wasn't the best climber. Nowadays, how many GTs can you win if you are not the best climber in the race? Probably zero
Yup. And Merckx was the best among other all time greats, wasn't he?
While there are certain differences in the level of sport acting like Merckx did it against random plumbers and cab drivers is simply wrong.