Agreed, many many factors can collide.
When I had spoken to t11 last night I decided to do a couple of friendlies. Condition burn on the winning team was between 8-12 and 9-13 on the losing side. The Striker on the winning team used only 8% condition. In a hard drawn CL match this morning my main team went through 17-26 from lazy to hardest working.
Since I play v stle a lot and sometimes counterattack, always flanks, my wingers and wide backs work hard too.