A lot of guys have said the same things I will. doesn't hurt to see a quorum on an issue though.
Did you get bait and switched? A couple of my buddies and I call that what happens when the "wife to be" behaves and says one thing before the wedding, and I joke that as soon as they say "I do" it all becomes "I don't". It would seem to me that guns would have come up while dating, it is possible though that the way things are going in our world with increased violent crime you are feeling the need to be more protected. Sure there's lots of things that are potentially dangerous that you could have in your house if you just legally could not have a gun. I'd feel a hell of a lot more comfortable with a gun in my hand than any of the aforementioned alternatives.
Maybe this gun thing is the ONLY issue you and your wife differ on. If so then you're probably lucky overall. If not then like almost every other guy I've met who's wife was adamant about something, there's other things too. I'll tell you the same thing I've told lots of buddies before they had kids, get out now. Once you have kids you'll put up with an endless supply of shit because there's kids involved. Before kids there's no reason to put up with anything.
They make these safes now with the easy to open finger pads, takes a few seconds twice a day to take a gun out or put a gun in. I have a 4&6 yo girl, I also concealed carry, but see no need to while I'm in my house. I don't have a fancy safe but it isn't that much hassle for me to twice a day dial the combo on my small closet safe and put it in/take it out. (locked up if I'm not here and it doesn't go with me). My daughters have both been told that they don't touch it, they've been around me shooting and have a respect for guns and in two weeks the 6yo is going to shoot for the first time (22, same one I learned with) the 4yo can too if she wants. The 6yo asked me if I'd show her so I know it's the right time.
I'm a believer in need and not have have and not need. If you have it 99% you'll never need it. I hate gambling on not having something and end up being the person that wishes they did.