This is probably a good thing, considering the circumstances of Kaytoo’s mission.
Can you imagine C-3PO going on a suicide mission to steal the plans of the first Death Star?
Alan Tudyk recently attended a panel to promote the upcoming release of _Rogue One: A Star Wars Story _(via EW), and he addressed possible comparisons between Kaytoo and C-3PO.
While C-3PO has become iconic for his cowardly nature, Kaytoo is far more confident and willing to engage in a fight if necessary.