Perhaps for those without the experience of wheel building it is.

When I was in my early 20s I got my first job in a bike shop. As the low guy on the totem pole, I got the layoff in the winter. I then got a piecework job building wheels for a regional distributor of bike components (this was before the days of the cheap wheel building robot). Every week I'd come into the office with the wheels I'd built and pick up a new supply of hubs, spokes, and rims. I don't know how many hundreds or thousands of wheels I built that winter but my callouses were so thick I could take pizzas out of the oven with my bare hands.