No, that’s not the idea. The SAME mag fires as Positive and negative, after all, it’s a magneto! Not hard to explain, I’ll quote Champion: “Other conditions that will cause excessive electrode erosion is constant polarity and high capacitance. Constant polarity occurs with even-numbered cylinder magnetos. One plug fires with positive polarity causing excessive ground electrode wear, while the next plug fires negatively causing excessive center electrode wear”. Many owners extend plug life in this manner, others don’t bother and just replace when some wear shows. But looking at what platinum or iridium plugs go for, it’s worth it to extend their life as well as massive plugs. Look up Champion’s diagram for 6 cylinder engines. Rotating plugs properly can extend their life. TC