VFR pilots getting themselves trapped in IMC conditions has been a problem since the Wright brothers.
There are many causes, such as press on itis, blatant disregard of rules, or simply unintentionally getting caught out.
Considering the dwindling number of GA pilots in Australia there seems a disproportionate number of these incidents
compared with the massive industry in the USA and our weather conditions are far more benign than theirs.
Our aviation police endeavour to tackle the issue with convoluted draconian regulation and penalties.
In the USA the FAA approach is education and mentoring.
There is also the fact that almost 80% of private pilots in the USA hold instrument certificates.
They do so because sensible regulations make it relatively cheap to obtain a certificate and maintain it,
they are not burdened with the same regulatory cost burden that apply here making aircraft far cheaper to operate thus
increasing participation and therefore recency.
Unlike Australia committing aviation is encouraged in the USA, Inane security requirements just don't exist in the home of 9/11.
Airports are not locked up by local owners with silly restrictions and burdensome costs.
All this aids and encourages participation. A practiced pilot is far safer than an out of practice one.