2005 Atlantic hurricane season - Wikipedia
2005 season...
Dennis: 150mph/930mb
Emily: 160mph/929mb
Katrina: 175mph/902mb
Rita: 180mph/895mb
Wilma: 185mph/882mb
The 1961 season had 7 major hurricanes including...
Betsy: 145/945
Carla: 175/931
Esther: 145/927
Hattie: 160/920
Of course there is the 1969 season with 5 majors including of course still one of the largest ever Camille with 175mph winds and a 900mb pressure...
There have been six seasons where more than one category five storm formed...
1932,1933, 1961, 2005, 2007, 2017
But wait there's more...
Only since the late 40s did we start flying into tropical systems as a way to measure them and not until the 70s was a method of using satellite imagery to estimate strength created.
So to draw any type of conclusions on long term trends of tropical system strength by cherry picking data points over such an absurdly insignificant time frame is very unscientific.
It's of course one of humans most common flaws, false positives, finding patterns that simply don't exist, and confirmation bias when our preconceived expectations are met and ignoring all of the times when they aren't (10 of 14 ... 71% of systems this season amounted to nothing).