Yes. That's why they hardwire and use a breaker rated at 100%. In most jurisdiction, code requires breaker at 80% if a plug/receptacle is used. If you are hardwired you can use 100% of your capacity before tripping the breaker. You have incorrectly assumed that I suggested that you ignore breakers.
When you hardwire the circuit the electrical code allows you to use a 100% breaker.
I.e. you would also want to be sure that your wiring was rated for 100% utilization, and that other circuit-breaker-like functions exist.
Fire is an actual thing, and figuring out the best way to recharge a halon system isn't exactly what you want to be doing.