The Bill Belichick and Nick Saban enforce strict behavior and dress codes for their employees to simply eliminate distractions. Break the rules and they fire you. They're the most successful "mission oriented" teams of the past two decades.
Uniforms contribute to the sense of "unity in direction" that the best companies have. They should be something that you're proud to wear as a signifier of your work, see IBM in the 70s and 80s.