It is very sad when horses die and we all get upset over it. But, that is what they are bred for and you and me both know that they can, and often do, die at home when safe and well. We lost one to colic last year who was a happy, healthy horse who wanted for nothing yet he was found in his stable dying one morning. I seem to remember you lost one in the field, a foal, one year? My friend's horse, one that I had one of my horses out with for many months, was found also found one morning in her field with a leg swinging.
The authorities do what they can to make the sport as safe as possible but this is jump racing - there will always be fatalities in the sport. Hell, there will always be fatalities in any equine sport and to be honest, the most horrific deaths I've seen have been during flat races.
So what are we to do? Send them out to do their job knowing that there is a chance they may lose their life, or keep them at home and cosset them, knowing that there is still that chance that they will lose their life? A death from colic is far more heartbreaking than a fatal injury on the track; it is slower and so much suffering is involved.
Was West End Rocker one of the fatalities? That's a personal guess, not based on anything I've heard.