Factually that's simply not accurate at all. The post 2005 era of hurricanes was docile by historical standards until 2017-2018. From 2005 to 2017 zero category 3 (or worse) hurricanes made landfall in the US. Most of those that did, were weak category 1 hurricanes. There was no increase in frequency either.
Texas got hit by four category 3 hurricanes and one category 4 hurricane, in the span of just 22 years, from 1961 to 1983. Nothing like that stretch has been seen by Texas since. Texas also got hit by five category 4 hurricanes in just the span of six years from 1944 to 1950.
Florida went 11 years between hurricanes, from 2005 to 2016, something that is exceptionally rare. They were hit / impacted by four in 2004 and 2005 by comparison.
Katrina also wasn't a once-in-a-lifetime hurricane. It was a category 3, those have never been that rare. The disaster in New Orleans was overwhelmingly caused by people and their neglect of infrastructure.