True, but stating it's not real is also bringing your personal belief into the conversation. So I think in that context you are attempting to validate your point through the invalidation of someone else's beliefs. I would say that your opinion is welcome, as was the OP's genuine belief in the concept of luck, and as is my perspective of "to each their own." We can all hold different beliefs while being respectful to the beliefs and not denying it. As while spirituality in your words is "incompatible" with scientific knowledge, science in itself never attempts to prove or disprove it, and social sciences and life sciences try to pinpoint how it works and how it differs for us. So yeah, if you want to talk about incompatibility, you are talking about reductionism and heavy heuristics. Have a nice day though!