Yep. In countries that have real air forces and real traffic densities, there are higher probabilities of mid airs. And those countries have decided that the costs of trying to reduce the probabilities of mid airs between military aircraft and civilian aircraft to zero are unjustified and just plain silly.
Australia, on the other hand, continues to regulate to put more and more cotton wool around everything and everybody, in the belief that the world can eventually be made risk free.
And the threat of mid-airs is such a rich vein of fear to mine for those engaged in the busy and lucrative work of making more laws and putting more cotton wool around everything and every body.
Let's hope the C150 pilot had CVD, so that there's more 'evidence' to justify cleansing the skies of the danger posed by CVD.