in my experience buienradar is never as accurate as whatever sauce the NWS provided that Apple uses for the weather app prediction in the US.

Granted, I've only used it for a bit while in the Netherlands, and it was accurate to the block and to the minute.

And every time when people would mention weather they would open the app to see if rain is coming in their particular location.

I think it's due to peculiarity of Dutch weather: you could have rain literally 100 meters away from you, but not where you're standing. So usual "weather in the general region of where you are" are probably wildly inaccurate