Ah, but the area is not always intuitive! For example, I’ve played a number of people who don’t realise that empty points entirely surrounded by one colour do not count as territory if those pieces are in a group that is part of a seki! (I myself didn’t know this for a while) Intuitively most people think it would count.
Japanese rules get pretty weird. You have scenarios where there is no draw, but both players loose. You can have pieces which are dead, but not removed from the board. One weird aspect of the rules is the hypothetical play during life and death, notably ko does not work the same during this phase as it does during the non-hypothetical play.
Here are some strange things that arise due to Japanese rules: Odd Cases 🤔 in the Japanese Rules