It's the same with gas work. Everyone I know was totally horrified that I'd just fitted a new boiler by myself and did all connections including gas myself. Some were screaming that it was illegal and others were telling me stories about how they knew people had been killed because of botch fitting.
The government have made everyone paranoid that if any work that isn't done by a registered person then it's dangerous and will kill you.
What a load of crap. Gas work is easy and if it's done wrong then the installer is a complete fool who wouldn't be safe to light a gas barbie. I do better work than most registered contractors. They tend to rush and cut corners. I don't.
Gas is much more dangerous than electricity any time.