because saskatoon was trying like hell to attract one.
As for the fact that saskatoon draws more big name waste of time arena acts than red deer is because those acts hit calgary and edmonton and consider the area covered, which if they've been to both they have.
The indy bands usually skip deer for the same reason, a western tour usually consists of vancouver, the bow valley, calgary, edmonton and winterpeg. Sometimes they'll hit kelowna or amigos in toon town to pay for some gas but the a for mentioned stops are the main ones.
"Now you wear your skin like iron
Your breath's as hard as kerosene"