It's a rather facetious commentary on the "now it is gen 3's turn for a disaster comment", by implying that if that progression holds, the so too should the sca

It's a rather facetious commentary on the "now it is gen 3's turn for a disaster comment", by implying that if that progression holds, the so too should the scale of damage. The gen 1 disaster left land uninhabitable, the gen 2 disaster just took some cleanup, therefore the gen 3 disaster will be a non-issue.