Biometrics, batteries, electronics....eh, I'll keep that old spin tumbler thanks. An intruder cannot cut my finger off and gain access to my weapons, they just have to bring a really big hammer!
To stay somewhat serious, education is great but I can remember getting into my dads guns at a curious 10, the hunter safety class came at 12, on the rifle team at 14. I was always careful but access is a temptation.