Lightning beats Earth simply cause it lets the Lightning User go through their Earth Style jutsu's easier. (Generally Mud Walls)
Also it won't change cause that is how it works in Naruto.
To add onto this, one of the most prominent examples of lightning countering earth would be Deidara
Spoilers to Shippuden (Not that it's really unknown)
Deidara was already shown to be skilled, however, Sasuke found his fatal weakness, electricity, which disabled his explosions, which were earth. This pretty much kinda led to Sasuke's victory and Deidara's death. Things would've been a lot easier if Sasuke used just fire.
Later on, Edo Deidara was impaled by Omoi's sword, over in the 4th GNW/SWW (Shinobi World War). Which disabled his ability to go...
BOOM!!!!
(Trust me, I would've put that in comic sans ms if it didn't look like a 2 year old wrote it.)
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