You realize this proposal does nothing to address flaws in GDP.
Its more a form of censorship. Similar to how internet search results and news media scrub statistics for how many trillions the EU is currently in debt. Its easy to find the US deficit in trillions. Try to find the same stat for the EU and there is a mysterious censorship blackout in effect.
Climate change is only the latest crisis being leveraged to push political agendas.
-Drug crisis: citizens must sacrifice rights, $$ and freedom to fix this.
-Terrorist crisis: citizens must sacrifice rights, $$ and freedom to fix this.
-Climate crisis: citizens must sacrifice rights, $$ and freedom to fix this.
And who creates this crisis? As all of these are manufactured agendas.
How would this be closing doors, ending opportunities?
Normally. GDP shrinks as doors are closed and opportunities are diminished.
Getting rid of the GDP metric is simlar to getting rid of deficit numbers or redefining unemployment metrics to illustrate a rosier picture of the economy.
It could be what happens when ruling elites decide to kill job markets and economies and want to conceal this harsh reality from the public.