I wish these prices were reflected to the consumer. Electricity bills in South Australia are ridiculous, and as a renter you don't have the luxury of installing solar panels.
Also, while I don't know details of the Australian electrical market, if it's anything like most of the world the consumer prices are regulated -- you don't get deep discounts during "cheap electricity" hours, but you also don't pay incredibly high rates during the days when e.g. people are running air conditioning during a heat wave and a couple major power plants had to be taken offline for emergency maintenance work simultaneously.
In part that's why rooftop solar is hazardous for a grid in high amounts- you don't pay the infrastructure price half the time, but the infrastructure still has to be there for you.
It doesn't ignore those costs you mention, it just also doesn't ignore the benefits. In some jurisdictions the benefit exceed the money the householders are being paid (it varies depending on how dirty the grid is, when peak load happens etc.).
For whatever reason, like negative prices, this attack on net metering appears to resonate well with people who don't like renewables, but it's just a talking point from utilities who see the ability to increase their own profit by taking but not paying for that benefit via political shenanigans.
Apparently the idea that electricity can be differently valuable at different times of the day or year is something that ordinary people are insulated from, so paying an average seems normal, but getting paid an average seems crazy. But it's not something being argued against from a wider economic standpoint of efficiency, as it is literally a good thing, that's why people proposed it in the first place and continue to support it.