Vertical meters are not everything.I was actually surprised by this stat.
The Vuelta this year with the 'soft' route still has more Total Elevation gain and more Elevation / Per Km than the Giro and the Tour.
Understandably Pog skipped it because he would have finished it too exhausted for World's.
Tour had 3 or 4 stages for GC riders very hectic and very stressful (stages 2, 4, 6, 7) despite few elevation. This is something the Vuelta doesn't have.