This is going round in circles.
As far as my humble opinion goes, I am - and have been for years - aware that most horses bleed. Some bleed all the time, some less often, but that is the unfortunate reality of equine physiology, added to the fact that we ask far more of them than they are designed to do.
The practice here in NZ of requiring a horse to be stood down is, I feel, not entirely fair. With the knowledge that most horses do bleed, it seems unfair to discriminate against a horse that shows blood from the nostrils when most of the field it has competed against will be bleeding too, just less obviously.
I assess my horses as to their performance, if they are racing well and consistently, I assume that they are coping with the level of disability ok. If they are not, then bleeding is considered, along with a raft of other possibilities including lack of ability....and their future is decided on the basis of that assessment.
If a runner has a bad bleed and drops out of contention, clearly that animal isn't able to cope at all, and another job should be considered - IMO.
One of my better performers - Ranger - a good middle-distance animal [ winner of the Easter Classic and Grt Autumn Hcp when those races were really worth winning ] bled badly before he ever went to the races. He won nine, bled nearly every time. But when he won his last race, the Greymouth Cup, he scraped home just beating horses that a year or so earlier he would have beaten with a leg tied up.
I retired him with the full support of his owner.
The Lasix argument doesn't concern me, I don't believe in drug-assisted performance.
Whether it is scientific or not, I support the stance taken by Japan and Germany in their quest for the superior performer. As in the quoted article, the best and soundest racehorses are COPING with the condition better than their peers.
A recent addition to our stallion ranks was a known bleeder in Europe...he won't be the only one of course, but has a high profile...