And I agree with you on that point. For me given that a handgun is a last line of defense and is more of a desperate measure I would prefer a larger caliber, as if I need as many as 15 rds in a handgun I need to reload my rifle instead. For that purpose I would prefer the 45 but I don't see NATO going to this. The 45 is more of an American phenomenon. I think we're at the point where we might ignore NATO and adopt a 45 for just the US, but NATO as a whole wouldn't change calibers.
Know the status of your weapon
Keep your muzzle oriented so that no one will be hurt if the firearm discharges
Keep your finger off the trigger until you have an adequate sight picture
Maintain situational awareness