To "actshully" you (because there are no absolutes in biology) pro-triathlete Lionel Sanders got his hba1c up to prediabetic range (5.9)

https://www.tri247.com/triathlon-news/elite/lionel-sanders-t...

Also age plays a pretty significant role. I know older asians who regularly walk who still got T2D. You could argue that walking isn't physically active enough... but they'd argue otherwise. It's all relative.