I agree there is a glut of Notams (25 at the moment), although the numbers these days are a lot less than when the A380 upgrade works were in full swing!
The problem lies in that there is a responsibility to notify the industry of changes that may or will affect 'normal' operations, but the day an 'important' bit of info is left out and it's found to directly affect the safe operation of an aircraft, then we'll end up in court having to explain why it was omitted.
Looking at the current breakdown of the Notams published, a good number of the Notams are for night curfew works only (8 of the 25), so they don't affect RPT. Another 8 Notams have been raised by Airservices Australia. That leaves 9 that concern obstacles (and Sydney is very close to the city compared to most ports, so cranes will feature here more than most or all of the other cities), spotlights, bats, and lighting issues.