Because what happened was their own doing, actively made happen by toiling laboriously every step of the way. Screaming at, smearing, and despising everyone who warned them about the potential consequences. Now that the end result is there for everyone to see and it's unmistakable, there is no way but to just ignore everything, feign disinterest and stop talking about it to avoid taking any responsibility for their own actions. Because that would be taking one step back. They'd rather die on the sh*t hill that they so laboriously built than take a step back and admit that they were wrong. Less, start correcting their mistakes...