I wouldn’t use such analogies on wildly unrelated subjects.

Saying „The long term effects of Xenon on the human body and brain are still mostly undocumented when it comes to repeated recreational use.“ sounds so much better!

Especially since almost all common magnets don’t actually effect a hard drives functionality. The internet states you need a magnet with a force of 0,5kg to actually cause data loss. So we’re talking a large neodymium magnet. Which makes this analogy even worse.

It’s honestly incredibly how much your analogy upsets me!

Sounds like a you problem, the analogy is fine. Just because the gas emerges unchanged does not mean the body through which it passed was.

Very good analogy!