It's not even a heartwarming story, if you think about it. Someone took a horse, trained it to run fast, and during the course of exploiting its ability to run fast for the purpose of gambling, fatally crippled it. Yay, America!That's it. There really isn't anything else that can be said.
See also: This TJ Simers column.
How many think Barbaro was heroic, or just doing what his human handlers wanted him to do? Or, had no choice what he was doing after being anesthetized? If we're going to start looking upon horses as if they have human qualities, then shouldn't we stop sticking a bit in their mouths, tying their tongues in place before races, gelding or loading them with steroids?