Did you read what you linked to?
"No true Scotsman is an informal fallacy, an ad hoc attempt to retain an unreasoned assertion.[1] When faced with a counterexample to a universal claim ("no Scotsman would do such a thing"), rather than denying the counterexample or rejecting the original universal claim, this fallacy modifies the subject of the assertion to exclude the specific case or others like it by rhetoric, without reference to any specific objective rule ("no true Scotsman would do such a thing")"
Where is the counterexample? Success refers to an abstract concept. Luck and success are different things. Luck usually contributes to success, but luck usually implies undeserved success. So successful people get lucky, but on average everybody gets lucky sometimes. The quote encourages people to focus on the things in which luck plays a minor factor. That's what intelligence is for, intelligence is not for optimizing luck.
And yes, that does make it tautological. So what?
So successful people get lucky, but on average everybody gets lucky sometimes.
But not everybody wins sometimes the lottery.
Another month, another rationality quotes thread. The rules are: