When you actuate the brake lever you expect your bike to respond quickly; to slow down or stop. When you push on a shift lever you anticipate an easier ride up a hill or speedier decent. A dropper should drop and a lockout should lock. If you have any type of electronics as well, the response should be as expected with the push of a button. We do not second guess. We rely on the manufacturers' recommendations and guidance as well as the use of proper tools.