I think you're totally exaggerating all through your post. Nobody said anything about world-class session drummers, and you don't need one to get useable takes. And nobody said anything about not punching in, so your accusation of "get it all in one take" is totally mis-placed.
The time it takes to go through a song and correct 4 minutes of bad hits has got to be longer than the time it would take to punch-in the bad parts or re-do the track, especially since it's not as easy as one may think to find silence in the spaces between the hits you want to move. You can't just move the snare if the snare is off. You would also have to move the overhead track, too, and that won't always work.
The MOST important part of the job of being a drummer is keeping time. So, like I said, nobody's talking about hiring virtuosos here. Even someone who could only do "Ringo" beats and rolls should be able to do them on time. If they can't, they need to practice. I know that's a bad word in today's world of "press a button and get instant results", but some people still believe in it.