While it's true that most crims don't go after the locks, it's not excuse to be stupid with locks.
Beefy != good.
In the US we have a company called Master Lock. They are used almost everywhere, with everybody going to them for a padlock, yet they are probably the most insecure lock company in the US.
Bosnianbill has a good youtube series on how to get into them, but even I, with my plebian lockpicking skills could pop one open in a few moments.
I suggest looking at Bosnianbill's channel for his video on good lock suggestion. It just needs to be something that will make a crim give up open trying it. Alien technology is often deterrent, even if it's easily bypassed.
Insurance is probably the best idea. In the US, most people would install a good window with nice access to your gun cabinet to show that you aren't going to take shit sitting down. That is the US, however.