You're pathetic mate, bet you'd love to punch out an umpire if you had the chance. Only card I've given was a flat out aim for the head and we were all thankful it wasn't spinal. I also play, and I see the difference of an umpire not running as it damn well shows.Sensitive one aren't ya? I bet you send players off if they look at you the wrong way. Please explain to me then. Help me understand why an umpire is doing high knee and A-marches before a game? And 100m sprints and walking lunges? All of this 45min before the game.
As for the warm-up, you fail to understand just how much the three umpire system requires. It's built on quick movement and 'switches' so that there's always an umpire to set the mark almost anywhere. Watch the screen next time, it's not just pass the parcel. They're consistently overlapping each other. Also, play travels faster than a player does yet that's just too bad because the umpire needs to be at that next contest or it's all over(generally speaking this where the weird bullshit decisions at AFL level pop up, they couldn't get to the optimum position in time) Again, quick and smart movement is needed.
Also really, that's just standard stretching for what they're about to do. Helps them perform better(or in the case of some of them, to an adequate level). Everyone about to run that much should do it. In any exercise.
Umpires and footballers will forever argue and that's across many sports. But saying that our umpires don't need to warm up to that level? You care more about what they look like rather than their need to keep after their bodies and ensure they can run a game out and do their jobs? Or better yet, you suggest that they deliberately warm-up so that people can look at them? Gee, maybe they might even warm up that early precisely because they might want to mitigate and cater to opinions like yours and earlier means less people see them?
But you don't have a shred of empathy for umpires and I highly doubt you'd ever become a good one.