And they shouldn't be. You wouldn't belive how many people call me saying their old school alignment guy set their car up with neg caster and positive camber. Then cant figure out why the car feels strange. Having been in the business the better part of my life, I can't understand what the mystery is about alignments. Very simple concepts to understand. Making adjustments can be tricky in some cases, but alignment guys should always have a firm understanding of what they are doing and why.
