@T.o.m., it is not necessary.
The drill as compared to skill thing is important. The goal is not to deadlift a kettlebell but to swing it. The deadlift is our tool to pattern the hip hinge. Once the pattern has been satisfactorily established, the trainee can start to learn the swing. Better, if you want to work on the deadlift more, to have them deadlift more weight.
It's also worth mentioning that we generally keep strength training reps to 5 and under at StrongFirst, hence things like the Rite of Passage work up to 5's, but swings for 10's. (And I'll note that swings for 5 with a heavier weight can be awesome, too.)
Learn a pattern, train pattern with increasing weight, volume, intensity, etc. That's the order. For the kettlebell deadlift, just learn the pattern, the move on to learning the swing pattern. This isn't the only way, of course, but it's the straightest route to learning and practicing the swing. More isn't necessarily better for teaching drills.
-S-