That's the same reason that you don't hear about people winning $10 in the lottery or someone being chased by a pomeranian. If it's not massive or dangerous they just don't care about reporting it. Hell even if it's dangerous most of the time they still wouldn't care if they can't think of a way to sensationalise it.
In this particular instance I would have to say they got it right and the description is appropriate. A 1.8 m individual is a large brown in anyone’s language, let alone at such a southerly location (as mentioned in the article). At 1.8 kg, with a body on it that looks more like a Mulga, it really is massive. I reckon something that size would also make short work of adult blueys and shinglebacks.
I used to see lots of browns at a property i used to work near Bungendore NSW , and i saw quit a few around that size over a period of 9 years0. Though most were around 1 to 1.5 metres. There was plenty of rats , mice and rabbits around to feed on. Plenty of bluetounges , shinglebacks , cunninghams and beardies as well. Was a great place to work for someone who is nuts about reptiles.