My father was a police officer. My father had guns unattended around the house relatively frequently. As a child, I picked them up. I looked at them. There was zero chance anyone was ever going to get hurt.
I was taught what guns could could do. I had actually fired guns. I fired my first gun (a rifle) when I was I was 3 years old.
Smart man. Since guns were an integral part of his life, he knew that you were going to be curious, so he taught you respect, and allowing you to sate that curiousity, kept you from being tempted to sneak it out by yourself. Let you know it could do great harm, as well as be a very interesting device, I would bet.
I never had guns in my house when I became an adult. It was not because I was afraid of them, it was because I had children and knew I could not train them like I had been trained. I did take them to the range but only my daughter shot a gun there. My son wanted nothing to do with it.
My son and I are lucky to have a tremendous outdoor range just a few miles from my place. So we hit there every so often to target shoot and relax.
Relying on a gun safe to keep your children out of trouble is insanity. If you love guns so much and need to have them around, train your children.
Now you lost me. Let's make a comparison I also make reflector telescopes as a hobby, and have even silvered my own mirrors. Great fun, and tests your skills at working with chemicals. But there are some seriously nasty chemicals in use. Nitric acid, Ammonium hydroxide which comes in little pellets that look like candy ,(who the hell though that was a good idea) and silver nitrate, which is more messy than lethal, but still poisonous, plus invert sugar and citric acid, just to mix food items in that nasty cocktail.
Until my son was old enough to know Never ever mess with this stuff, you can damn well be assured that it was locked up.
Two other items where a gun safe isn't at all insanity:
If you have visitors with children, are their children going to be properly trained in the safe use of firearms? If I have 'em locked up, I don't have to insist all visitors to the house have passed a firearms safety course.
I also have some friends with a lot of firearms. Collectible stuff, one might have around 100 kilobucks worth of guns. Just leaning really valuables in the corner, isn't that good of an idea, and thieves might find his place a good target. So what do ya do? A dedicated room, and yeah, with locks on the door. I can't state for certain, but I'll bet that is a requirement for insuring the collection
So you can go ahead and think I'm nuts. I'm not about to re-arrange my life around my firearms. I'm not about to screen visitors to the house for gun safety smarts. When My son was a child, I wasn't about to trust his friends with firearms when they visited.
Training young people in firearm safety and locking the things up when you aren't using them is not a mutually exclusive situation.