Yes, at any point in time, you can be lucky or unlucky.
By changing the odds of an outcome, you’re not changing your luck, you’re changing the odds. Even having 99.999% certainty you can still be unlucky and land in that percent. Probability is not deterministic. And what determines the outcome? Luck.
I might be misunderstanding your point, but other people are treating luck as mere chance or odds, while you seem to me to be treating it as something binary that sounds a bit like "destiny" or "predeterminism".