A power brick is sort of like a real brick - a big chunk of plastic which should be out of sight/mind and can be placed just about anywhere, as most people tend

A power brick is sort of like a real brick - a big chunk of plastic which should be out of sight/mind and can be placed just about anywhere, as most people tend to do, often on the floor/behind the desk, etc... generally communing amongst other forgotten cables and dustbunny colonies. External GPUs + enclosures are larger and more expensive than power bricks and therefore are probably best kept somewhere relatively safe, especially while connected to a tiny Thunderbolt port - I've personally seen plenty of bent/broken USB/FW ports due to cable management "issues" among friends/acquaintances/colleagues.