Furthermore, in the opening segment of A New Hope, when the stormtroopers board Princess Leia's starship, notice that the Rebels do not have fully automatic fire blasters. My interpretation is that the armor incurs a minimum charge to penetrate effectively, which imposes a cost on all weapons against the Empire. This cost would be significant galaxy wide, even with only partially effective armor. Those equipping the Tantive IV obviously could not afford better sidearms for the crew, than those which could deliver a charge sufficient to penetrate the armor effectively in at best semiautomatic fire mode.
This is the dorkiest thing I ever read, which is to say, I like it.