Well let's do a little math... Over a 20 year period Australian Universities would have published 1M articles... 250 retractions is 0.025%. Your story casts doubt on the overwhelming hard and honest work of scientists. Is it 'news' or is it to get 'clicks' and outrage?
What if it's 90% of the papers published by the authors who've had retractions? What if it's 90% of papers from the labs that they work at? Neither of these are unheard of