With the added benefit of black in its identity, Abzan gives you access to those pain cards, making your win conditions fairly clear-cut as you face off against your opponents
Plus, Commander players usually like a diversity of colors and strategies, so even good colorless commanders receive some colored abilities here and there to expand players options like weve seen on Golos, Tireless Pilgrim or Ulalek, Fused Atrocity
For example, a large set has 101 commons
8 Morph, Space Goo Anything You Want It To Be Morph, Space Goo might not be the strongest card around, but it has so much versatility and potential that it's almost impossible to ignore
The goal is to bleed them out of resources and then switch aggressive attacks
If so, token decks may be right for you