I think it’s a fair statement to say that anyone who competes at that level has to be almost unbelievably driven and competitive to get there in the first place.
These are not people who got to the point of galloping around a five star by giving up on the idea of competing at any point, much less in the heat of the moment.
This is the same type that would climb back on the horse after a fall and finish the course with broken bones or a concussion or what have you. That went on for decades until the rules changed regarding falls.
With that in mind, it might be time to look at the rules again.
If they can hold a horse on course to check for blood and then let him continue after being checked out, they can do the same thing in a case like this.
Especially when the whole thing is going out across the world on a live stream, and everybody is concerned about the social license to operate.