
Unfortunately most folks are under the impression that they don't have to worry about the electrical system because they think breakers will trip and protect them and the boat when they try to push a circuit's limits or something go wrong. That's not always the case as tripping is dependent on a few factors. Your shore power inlets, cords, dockside pedestal, on-board wiring, etc. can burn up and cause a fire withouttripping a breaker.
Unless there is a loose connection or poor wiring practices used, typically mechanically fastened/permanent on-board wiring connections are safe if done right. They usually stand up to vibration and movement which can loosen things up. Shore power cords and their connection points are typically less than a secure/complete contact resulting in a steadily worsening condition which can eventually lead to heated cords and plugs. Once that occurs, the result/condition gets exponentially worse over time and is exacerbated by the lack of power management. While there are some better shore power plugs out there such as the Smart Plug ( https://smartplug.com/, the key is to ensure you're not overloading a circuit and to inspect electrical hardware that isn't permanently fastened such as your shore power hardware.