Yep. I think pretty much every youngster gets some basic education (besides getting years of physics in high-school): disarm the group/fuse, double check with a power tester, make sure you are not causing any shorts. I don't know anyone who calls an electrician for replacing a light fitting, a power outlet, or light switches.

Besides that some European countries have required for decades that new houses/apartment have central residual-current circuit breakers for the whole house (unlike the US where as far as I understand they are only required in certain areas and are often in the socket and not centralized).

I do that work almost every day. What if the untalented handyman crunches a live cable and the metallic frame is on fire? You can repair how and what you want, its your house and children.