A more poignant observation is that there is a hell of a lot of rocks of this size that we haven't even noticed yet and we've only started looking. The rock in question is US State size obliterating event. Not a showstopper for life as we know it, but a serious inconvenience for anyone who catches a piece of it.
Quite agree. Radioastronomy is used to hunt for sun-side rocks, which are difficult or impossible to spot using visible light (because of the Sun swamping everything else). The Earth gives a come-hither to many an asteroid, tugging at them each time one passes or we pass one. Over time, some of those will come down.
Ten years or so ago, fired by the SL-9 impacts, there was a surge of interest in NEOs. For years thereafter the estimates of the number of unknown rocks was quite a lot larger than it is now. Partly that was due to grant-seeking. But the current accepted estimate of the numbers seems far too low.