The meaning of the word lucky has shifted over time as we stopped believing that certain people have things go their way more often than average because fate, the gods, or whatever favors them.
I had stopped believing in fate, too—until I learned that (popular astrology app) Co-Star makes heavy use of Haskell[1]. So since they got my horoscope to compile, it’s probably correct.
If two people play the lottery the same amount of times and one person wins way more than the other, You would say one person was luckier than the other.