The disasters that honest caring people have devoted time and energy discussing, and seeking positive change, are the disasters that MEN have caused directly or indirectly and are things WE can do something about.
The sun growing unstable is not among the disasters that the intelligent people here have discussed in detail.
A 7,600 mile asteroid miss is better than a mile. If it had been 7.6 miles then the asteroid would have... but again these are the very disasters in which we have no appreciable defense and are not man made. The amount of money dedicated world wide to the tracking of earth crossing asteroids is a tiny fraction of what a busy McDonald restaurant makes in a year.