Demanding importance is somewhat hard to grasp. It refers to someone who is extremely choosy and disapproving. A persnickety
individual usually nitpick and sets the bar high when it comes to standards and perfection. Their attention to detail can be viewed as laudable, but it can also intensify extreme criticism and avoidable dissatisfaction. Being persnickety is typically related to precise focus on specifics but can also be seen as a manifestation of obsessiveness.
