Commonly, yes. But this may have been a workout with a very low PL, and meant as a beginner level workout in that light. Hard to say without seeing the actual workout and context to the rider PL.
At a guess, we are likely looking at a situation with a new rider and 1.0 PL, so the lowest level of workout around 1.0 to 2.0 would seem to be what would be assigned by AT.