My probability that the decrease in audiovisual investments forced the new streaming quotas in Australia is 30%, and I lean more towards the idea that other factors were more decisive.
Indeed, the 18% drop is certainly significant, but the notion that it is the only and sole trigger of the government decision seems to me a too simplistic reading of political complexity.
My alternative hypothesis is that internal political pressures or institutionalized cultural objectives preexisted, making this decline a convenient pretext rather than a necessary and sufficient cause.
For example, countries like France implemented local production quotas for broadcasters and platforms well before observing a similar investment crisis, which indicates a structural political will.