Value is not always just initial price. A lot of people conflate the two and end up with poor value. Not specific to this situation but a common practice. I always look beyond initial value because I want to think long term unless literally just a one time use object that will get tossed or is not usable after that one use. A helmet technically is a one time use object but when you need it, it is a critical item and your actual final use of the item could be at any time anywhere for any number of reasons. Safety is more important than cost at that point. Granted that is not to say you need to spend a fortune to buy safety but weighing your options and looking at helmets more likely to see R&D that would lead to bigger safety is important.

It would most likely pop or deflate well before it needs to protect you and probably will not have the same effects that EPS foam or Koroyd or similar materials have when impacted. There is a reason behind a lot of this stuff and not because Big Foam has shut out Big Air.