Being expert means having ability to recognise certain patterns and having skills to apply then. So yes details don't matter much if pattern recognition works f

Being expert means having ability to recognise certain patterns and having skills to apply then. So yes details don't matter much if pattern recognition works fine (and it's ability to work is in some degree dependant on ignoring non-essential details). Which details don't matter is aldo learned through experience. There is a danger of miscategorizing if one gets too confindent and sloppy.