I think people just want to be paranoid, better than thou, judgmental, spoil sports. And that is my sugar coating.
Seriously, dogs get hurt. My dog runs into the couch, he skids around corners, he hurts his sister all of the time just existing. Sloan has a torn ear from going for the ball at the same time as my foster staffy. She has an injured shoulder/elbow from Backup slamming her into a jump. She has a jammed toe from running into an xpen chasing a ball. She has a dislocated dewclaw from god knows how. She had a broken tail from being shut in the door. She has a broken tooth from either biting the chain on the spring pole or slamming her egge too hard. She has had soft tissue damage on her chest from hitting a harness too hard. I am sure there are more injuries from wear and tear as well. Backup is going to the chiro tomorrow to be evaluated because I think all of his frantic splaying and skidding and crashing is catching up to him. None of this is ideal but none of this came from rain, nor other sleek surfaces.
I say you train your dog the best you can, you teach them footing, you teach them collection, you teach them impulse, and you pray for the best.
We work through worse spills in bitesports, flyball, and even dock dogs. I have seen dogs trip and fall head over into the pool, I have seen dogs clamp on the EV bar, I have seen dogs almost land on the pool rails. You don't stop what you are doing, you train better for next time.
I don't love SG, she's not my idol, I think she's nuts for posting that video and expecting any other outcome but I think people were down right hideous trolls in the comments. I think she's right about why she ran, what went wrong, and how she plans to train for this situation as opposed to giving up.
I don't know why anyone would run on that ice floor previous to the SG video. That was nuts, even for any sport, any dog, any reason.