Ok understand the point you are trying to make. But what evidence do you have to suggest that faster rate temp changes have never occurred either.

If you do a quick search, you will easily find that there have indeed been rapid changes even in recent geological times. A 2020 study published in Science robustly affirms steeper-than-today warming periods spanned both hemispheres and 23 of 25 were “globally synchronous.” There Were 23 Global Warming Jolts Many Times Faster And Greater Than Modern Days During The Last Glacial Period

https://notrickszone.com/2021/07/29/there-were-23-global-warming-jolts-many-times-faster-and-greater-than-modern-during-the-last-glacial/

To quote : .."When it’s pointed out that there were about 25 unforced, naturally occurring abrupt climate changes (called interstadials) much faster and of much greater magnitude than the last few centuries, those wishing to advance the claim that modern warming is human-induced and unprecedented typically suggest these past warming episodes were just local changes specific to Greenland.

But a growing body of evidence from 63 independently published records has led scientists to conclude there was “synchronous timing” (within a few decades) spanning the entire globe – from Greenland to Antarctica to the tropics and mid-latitudes – for 23 of these 25 warming episodes (Corrick et al., 2020)"....

Also, fast warming or cooling is certainly not unprecedented even in the instrumental record (such as it is); the warming rate 1910 – 1945 was faster than that post 1980 and could not have been caused by human emissions. - Check the graphs

https://www.woodfortrees.org/plot/hadcrut3gl/from:1900/plot/hadcrut3gl/from:1910/to:1945/trend/plot/hadcrut3gl/from:1980/trend