I'm not sure that's true. While abundant in the universe, there's a fairly finite amount of helium here on Earth, and once it escapes, it leaves into space for good. The US even has a strategic helium reserve. The shortage of helium was reported back in 2012 [1] We really need that helium for things like MRIs and chip lithography processes.
This might be true, that you don't lose much, but every day they'd need recharging a bit, and even without dirigibles, we have barely a century of supply. That is not much. The market rate is criminally low.
https://priceonomics.com/the-increasing-scarcity-of-helium/
Well, I agree Congress's elimination of the Strategic Helium Reserve was criminally stupid. I was addressing the cost point, though. Helium is still reasonably cheap, so it's lost in the noise, financially speaking.