Ascot I have just been told they think it failed because of throat troubles so I expect an op is thought to fix that problem so that's why the gamble,for me tho no throat no breathe properly.

I wouldn't buy a horse that was a roarer as a yearling however dont forget So You think had breathing problems, was a roarer, and had the same op before he even started his race career and 2 cox plates and another 6??? I think Group 1 wins is not bad

Perfectly ready, Toorak Toff, another couple that spring to mind that had the op and then still won. And yes maybe thier best days are behind them but that could be other factors also.
The problem is the old op only had about 20-30 percent success rate, but with new technology they are up to about 75 percent success rate.
Its a hard game. You can pick the most perfect horse with conformation, x rays , scope and the thing has no ticker and still can't run.
If you see Bel Espirit , his legs are on backwards. It is the most amazing thing to see. Didn't stop him from winning and winning big and also being the sire of the worlds highest rated champion mare.
He was bought by sheeds and the crew for around $9000 because he had these defective knees.
$2 Million in prizemoney later, the gamble worked great for him.