With all due respect if an animals bred for a purpose but it doesnt suit, in my eyes, there is every reason to cull it. This is more prominent in race horses than any other animal i can think of (apart from fighting dogs which of course is totaly illegal).
I had money on Synchronised and the owners of According to Pete seemed nothing other than a totally ordinary Yorkshire family (for what that worth). Its not good when ever a (working) animal dies, whether thats a lurcher running into a fence or a race horse dying at the national.
You seem to be implying that there is a place for ever