Demanding importance is rather difficult to understand. It refers to someone who is vitally meticulous and fault-finding. A persnickety individual tends to be meticulous and sets the bar high when it comes to expectations and perfection. Their attention to detail can be seen as admirable, but it can also magnify extreme criticism and avoidable dissatisfaction. Being persnickety is frequently connected with meticulous attention to detail but can also be seen as a form of pedantry.

Persnicketiness Definition Meaning MerriamWebster