My wife gives me funny looks sometimes as I add to my gear, but I think she appreciates knowing that I would be able to take care of her and my son if something happened.
Do I obsess over my gear sometimes... Sure I do. Then again, what price can you place on safety? The life of your loved ones? As they say, stuff happens. Best to be prepared.
You're not the only one who gets funny looks from your wife. Recently, I bought one of the recently discussed KaBar knives. I found it used and cheap, so I bought it. I would have preferred the smaller version, but I took the larger 7 inch blade because of the price. She seemed worried that I was buying more "weapons," but she doesn't even know about the kukri. She did seem happier after I told her it was in her BOB, into which she has never looked.
I also think obsessing over gear and plans is a common problem with people on this forum, not that I think it's really a problem. Of course, I'm the guy who has a bunch of heirloom seeds in a drawer although I live in a Manhattan apartment, which has no place to really grow anything.