Looks like the whole ship power system was designed to be multi way redundant, but not to provide continuous power. Makes perfect sense for dealing with issues

Looks like the whole ship power system was designed to be multi way redundant, but not to provide continuous power. Makes perfect sense for dealing with issues that occur mid voyage, where you can send someone below deck to mess with circuit breakers for 20 mins to get everything going again. Doesn't make sense in port where loss of steering or propulsion will lead to a crash.