JumpCrisscrossHelium Is Hard to Replace
https://www.construction-physics.com/p/helium-is-hard-to-replace
Is there any way to actually produce helium other than nuclear fusion? I would assume not, but I'm not an expert in this field.
It's also formed similarly to oil over millions of years underground if I understand correctly so can be a byproduct of natural gas mining.
It's often found alongside natural gas because the rock structures that can trap methane can also trap other gasses, but the original source is different - thermal decomposition of organic matter for natural gas and radioactive decay, mostly of uranium and thorium, for helium.
I agree that the "accumulation over millions of years" is similar (and similarly a potential problem if we burn through all that accumulation).