I explained it a bit further back so go and take a look and stop pretending I didn't.
No, you didn't.
You provided garbage which was quickly refuted.
Again, if your garbage was true and helium can't magically switch back at atmospheric pressure, then water can't either, instead water would need to go up high into the atmosphere to take its place before falling back down.
Again, stop trying to come up with an excuse for any tiny little bit of reality in complete isolation from the rest of your garbage.
If you want an explanation you need a coherent model, you need to have statements made be transferrable.
You don't have that, so you don't have an explanation.
Either helium should be able to convert back near sea level, or steam can't.
That is why there are 2 parts to the question:
Why doesn't
helium just magically transmute back into air, just like
steam transmutes into water?
To explain it, you need to address both.
You need to explain why water will switch back, without needing to go to its equilibrium level while helium just goes up.
And the simple fact is you can't, while mainstream science can.