Well, the original idea was the three primary stats and then percentages for the secondaries, but then I thought "Who wants to deal with calculating percentages when you could just assign whole point values?" and changed it. As it stands, it mainly just reinforces the idea that the Secondary Stats represent dichotomies within the fields of the Primary Stats, for stylistic purposes.

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"Okay, I got your henshin pen from Lu- er - from the top-secret Moon Cave, so here it is!" Usagi chirped. "Just hold it up and say the first thing that comes to mind!"
"This feels really stupid," Ranma deadpanned.
The pen shot a few raspberry colored sparks and made a rude noise. - R1/2&SM: No Henshin (unwritten)