BCT is just about making you react and listen to orders in high stress situations, like when a machine gun is clacking right over your head. That does mean overriding fear responses and making you quick to react but they don’t have you stand up and drop down a hundred times because it makes you more likely to spit on the Constitution if an orange turd tells you to. Hell, I remember Obama’s inauguration a dude was running around with his official photo cheering.