Career and work
Fours are the operational spine of almost every organization worth working for. Engineering, operations, trades, finance, law, manufacturing, project delivery, anything where a mistake has a cost and a standard has meaning. They are poor fits for genuinely chaotic early-stage environments unless they are explicitly hired to bring the chaos to heel, which is in fact the best possible use of a 4. The career trap is becoming indispensable at a level below their capability, because the person who holds everything together rarely gets promoted out of holding everything together.