Don't get me wrong, I've come across a lot of wonderful, truly smart hams; but I've also witnessed many hams who really never should have gotten half-smart.
Hams are amateur electricians, hilarity /will/ ensue and it won't all be funny.
Some of the best RF guys I know, have no formal training - because there is important theory around RF - it doesn't always work like projected.
In my industry a Ham Ticket has taken the place of a GROL as something employers look upon favorably, because it means you generally should already have a foundation of RF theory.
As in, avoid? Or want?
Electricity is unforgiving and a lot of the safety rules in licenses above Technician try to instill that fact.
Joking aside, there is a minor risk of RF burn if you do really stupid things that you have to learn not to do to get a license. I can’t really imagine someone getting hurt by the radios themselves.