In the early 1980s, the magical girl genre was going through a different phase from what we know nowadays. Unlike some of the most well-known series today, the magical girls from that era weren’t necessarily superheroines, but they were still inspiring (or helping) figures. If there was any stake, it could be in keeping others from finding out about their magical powers–and in some cases, their alter-egos–otherwise there were usually consequences such as losing them.
Those magical girls didn’t necessarily need something to fight for or a particular reason to have their powers. Sometimes they just got them for the very respectable purpose of doing whatever the hell they wanted, with only the show’s morals–and their own powers–as limits.