You are technically correct about the BAC, but they definitely cannot have one while "on duty", there's an 8 hour limit between your last drink and flying and s

You are technically correct about the BAC, but they definitely cannot have one while "on duty", there's an 8 hour limit between your last drink and flying and some airlines have longer time windows by policy https://www.law.cornell.edu/cfr/text/14/91.17 https://www.law.cornell.edu/cfr/text/14/91.17