Why are the rockets not razor sharp, skinnier and taper off at both ends farther to cut through air better? Would making a rocket more aerodynamic allow it to be more efficient flying as a "Kármán plane"?
In other words: I know why the rocket bottom is flat and that is not what I am asking. I want to know why rockets are so blunt? Could a rocket be designed to be more aerodynamic on the second stage for a sustaining prolong burn and flight at the Kármán line?
I added this picture to show how the rocket could be tampered at both ends.