Simple machines have always fascinated me. Levers, pulleys, gears, and the like have been around for centuries or more. And with good reason, they are tremendously useful.
A registered trademark can act like a pulley or level: it does the heavy lifting of trademark enforcement by placing the mark in the USPTO records, and by making any infringement more likely to be resolved quickly and favorably.
For more trademark visuals, see: https://www.erikpelton.com/resources/trademark-visuals/