Yeah, there's a reason for them, especially commercial/facility doors like that.

I highly doubt there are countries where just every door is like this. It's substantial extra cost to have both sides take a key instead of one side having just a knob.

For safety you can keep a key nearby out of reach from the window.

Honestly tho, the windows in doors might as well be "door" compared to how easy it is to break a normal window or even just force one without breaking the pane. And that's not even getting into how easy it is to learn to pick locks.

99.99% of security is just being harder to break into than the house next door. Like people talk about "not needing to lock the doors at night" like people are just going door to door and if it's locked they give up. And sure, the Night Stalker or someone did do that, but the vast majority of the time it doesn't, and if someone checks if a door is unlocked, it's because they're committed to getting in and are going to look for other ways.

People have a weird illusion of safety where they think the door is the only way into a home, so they put effort into making that as secure as possible, and just ignore everything else.

It's all just security theater like TSA, but on a smaller scale.

If someone wants in a house bad enough, they're getting in. It's an uncomfortable reality most people put a lot of effort into not realizing.