There are other factors in this situation as pointed out just above, but as far as your comment goes, you are *exactly* right.
Almost every condition of existence is a mitigated disaster.
The very existence of a modern society has caused untold destruction on the environment. However, the fact that we like being alive is presumably a good that makes our existence a "mitigated disaster".
So, yes, I'd call a mitigated disaster much better. In fact, that's the best you can hope for, aside from pretending the people who feel it's a disaster don't count.
After all, *everything* has a cost.