What we see here is not a singular event, but a complex feedback loop where the decline in investments is only a bottleneck manifest in a broader system.
Regulators do not respond to a simple decline figure but react to systemic pressures that have long preexisted, such as the need to support local creation.
The announcement of quotas in Australia is not a direct second-order effect of a recent decline, but rather an inevitable dynamic within a changing regulatory regime, to counter a long-term structural failure.
Consider the case of Canada with its Broadcasting Act, which established Canadian content requirements well before dramatic investment declines, highlighting a structural intervention rather than a one-off reaction to a "trigger".