It seems non-intuitive exactly because you are used to imperial: "For a long time in my country, we used the imperial system for stuff like that". If you really were raised using metric not for almost everything, but for everything, it would seem intuitive and you've found the other system strange. And vice versa. That's just, in immortal words of Bjork "human behaviour".

He just said he wasn't American so why would it be intuitive to him?

I am not an American, but until a few years ago there was not much of a push to move to metric on things like tools and plumbing. A lot of the world used imperial for such things even if they were not former british colonies.

I understood what you meant. I was just saying that your case is different since it wasn't necessarily that way for you the way it is for Americans.

There are many domains where imperial units have a nice human scale that makes sense, and then there are others where it is total trash and useless. I still fail to see what's so terrible about using both.