Look, I agree with zagafi that the OP worded the post specifically to be inflammatory. But that doesn't negate the argument, which is that there is disagreement that the industry is "doing all it can" and the you-still-drive-cars argument is totally not the same thing.
And as inflammatory as the post was, you can just look at some of the other threads and see all the people saying "that's it, I'm done." This was hard. And it's not just racing. Go to the front page of this week's COH and the first two items are the euths of The Quiet Man and Frodo Baggins, both casualties of this year's Rolex. Three big, wonderful "well cared for" horses all dying within one week! C'mon, it's denial to not think all this shook up an awful lot of people.
Edited to add: Looking further down the same page of the online COH, two of the other items are the euthanization of Task Force (Southern Pines Horse Trials) and TWO MORE horse fatalities at Red Hills. Again, not racing, but all this piled up together in a VERY brief period of time is a big red flag. I've been with everybody else saying, it's just a run of bad luck, but as the years roll on the the deaths don't decrease.......pick ANY other sport involving animals, ANY one (besides bullfighting) and think if there were deaths in the biggest, most popular events in that sport, what would happen?