( I’m speaking in generalisations. )
The Bajorans became wizards by interpreting the 'prophecies' of the timeless aliens of the wormhole.
The Klingons became wizards by using metaphors for physical warfare. (e.g: "Queen Amidala vs. the Klingon Warriors" )
The Ferengis became wizards by advocating greed, trickery - and even deceit.
Yoda became a wizard by advocating self-control, peacefulness, and a Stoic state of mind.
Ezekiel became a wizard by being a standup comedian.
Felicia Day started as a computer games' addict, which I had been one as well (and she wasn’t a one-trick-pony).