Honestly, if my niece's quinceanera balloons stop the world from being saved, there's something deeply wrong beyond my scope of helping.
The noise about a shortage is because the US gov't decided to stop subsidizing storage and delivery of helium, and scientists untrained in economics see "losing a subsidy" as similar to "a shortage" since the net effect is the same - prices are rising.
Culling recreational use would add 10-20 years of supply, which is unlikely to be the 'make or break' bridge to fusion or space mining.
Let people have fun, it's arguably the meaning of life.
Humans had thousands of years experience having fun w/o wasting non-renewable resources.
Genuinely curious, are you speaking of pre-Bronze Age civilizations?