yes jim , that was exactly my point
technique in all forms of music is a tool so that singning and interpretion is enjoyable and easy , so professional singers can enjoy singing if their technique is good because thay are not worrying about being able to perform, professional singers can enjoy performance if their technique is good because they need a good technique because they are using their voice much more than a source singer would , ok is that clear?
that is also where alexander technique can also become important.
source singers were not using their voices seven days a week for several hours , that is where warm up, exercises advocted by the like of your friends maccoll and seeger are useful