The point is if anybody wants an actual "good" engine then it's going to get the all the appropriate machine work and that includes at minimum a hone and more than likely an overbore on a used block, and most all of us run modern day better oil so I don't understand that comparison, and although not everyone can keep or even get a carb to run clean and efficient there are plenty that can and lets not forget the many many reasons why even the "beloved" EFI can get out of fuel control and in many cases on an older conversion build the owner of the car may not have the ability to even realize it.
