I've dealt with people like that before.
The easiest solution is to solve magical bullshit with magical bullshit.
"Oh you're right! Let me get the special magnet that blocks out the cancer causing stuff from the inventory people".
Then you go out, get a random magnet, and just stick it on there.
I once dealt with someone who thought being close to a router caused cancer.
So I put a key ring "cage loop" on top of it that forced the internet waves into the ceiling instead.
These people don't understand technology -it's just magic to them. So you give them magical solutions every time.