Tomcat Really, i am surprised to hear that. I am saying it as the person who is drawing up the blueprints (homes/buildings), not as a jobsite foreman reading/constructing.
The architect surely can make mistakes with hand drawn prints... however i have always found "building" the home mentally with paper and pen to allow me to find those "little" issues with how to tie points together... vs simply asking software to lay out a floor system... point loads... walls/beams.... the software would do what was "correct" on paper... but not logical for long run error proofing.
Those little inconsistencies is what makes a good foreman though... being able to "read" the prints and know how to dynamically adjust each faze of the process.
I am SURE the software that is used makes all the difference too! I must admit it has been many moons (8 years or so) since i drew up anything that required a "stamp", and the software we had may not of been the best. My brother and i have drawn all our plans by hand our entire careers, though some times prints need to be recreated digitally (where hand drawn prints were not feasible (wanting to see different layouts/siding/windows at the click of a button)).