Not really, it was already planned:

‘Do this now’: Premier’s fast-track after machete violence

They were expected to take effect from September 1, giving police time to prepare for the changes, according to Allan.

https://www.thenewdaily.com.au/news/crime-news/2025/05/26/northland-machete-ban-victoria

But she has brought it forward thanks to people like this lovely chap:

Also these 2 died earlier in the year because of gang violence in Melbourne:

Multiple young men have lost their lives in fatal stabbing incidents in suburban Melbourne in recent months, including 24-year-old Lino Atem in January and just over a month later, 24-year-old Natan Mwanza.

https://www.abc.net.au/news/2025-03-14/machete-knife-crime-victoria-explainer/105049700

Melbourne has massive issues with violence and it has been going on for years now

Victorian crime at highest rate since 2016, driven by car thefts and young offenders

Victoria Police said a hardcore group of young offenders aged between 14 and 17 were responsible for the sharp rise in aggravated home burglaries.

https://www.abc.net.au/news/2025-03-20/victoria-crime-car-theft-youth-offenders-police/105074300

This is Australia, we are a first world country and you have every opportunity to better yourself, we shouldn't have criminal scum like this running around.