Of course most people shoot factory ammo in Europe, too.
95% of all 9mm ammo I shoot is factory - including what I shoot in my Parabellum! I just choose ammo that is relatively mildly loaded, around 1080 fps rather than 1180 fps for a 124gr bullet.
Reloading bulk 9mm ammo is completely insane economically, a huge amount of work might save me a cent or two per cartridge.
I do handload special 9mm loads like subsonics as they are a lot more expensive when bought from a store.
But seriously, I have never heard this idea of hot ammo suggested by anyone except Americans. Least of all by Parabellum enthusiasts, who, as I wrote, often completely condemn the use of any modern commercial ammo.
But yes, I guess we are basically in agreement even if it might not seem so at first
