I think that statistically, lightning is more likely to strike again in the same place because whatever is there to provide a ground is likely still there and when another storm comes across the same place, Flash! Ka-Boom! Another strike in the same place.
If you've ever seen films of electrical storms moving across the prairie states, You could almost superimpose films from several different storms on the same path at different times and the films look like copies of each other.
Chas·lighteningalwaysstrikestwicenotneverstrkestwice