It's simple: People trust tooltips.
By fire/ice I assume that you mean a build that has "War of the Elements: Burning Ice" ruby. If you have it, you never generate lightning force points and according to Lightning Jolt english version tooltip description, it works only at start of elemental cycles that allows you to build up lightning force points. Which is NOT true.
Since my.com doesn't take it seriously to make sure tooltip description is 100% consistent with how the skill actually works and people assume it works as it says, they don't take it.