Even though I think it's not a good example, because it's so gruesome, the point is the same. Events like that are completely random chance, or bad luck, for the concert goer. And it happens enough to know that it's possible it could happen again.
I personally dont think there is much luck in chess, but there is probably more than a zero amount. If even grandmasters attribute some of their outcomes to luck, it makes sense that some of my outcomes could be (in a small way) because of luck.
The only things in chess that I have posited as undeniably due to luck are such events as a power outage causing a forfeit in an online game or a heart attack at the board in an OTB game. In such cases no player's skills were involved in deciding the winner/loser of the game.
But you can't claim that luck doesn't play a bigger part. It may be your opinion that it doesn't but you can have no evidence for it.
I didn't want to copy your post before this one, because it was too long. But you said that sometimes it's a matter of chance if a skilled player selects a certain move over another one.
I know this has happened to me MANY times. I know enough not to play an intentionally bad move (or at least one I think is bad) and I may have 3 or 4 absolutely identical moves to choose from. I literally have no idea, of any kind, which one is best. I don't have a thought or plan or idea or suspicion of which move could lead to a better position. I don't even choose one based on if my favorite piece is involved, or which side of the board it is. Nothing.
In those cases I don't know what else to call it other than chance, or luck.
I have read your posts. They prove nothing, are full of grammatical errors and non-sequitors that sometimes make your intentions unclear, and ramble over the same unsubstantiated boastings about how you are correct about everything, mistaken attributions, putting things they never said into other posters'.mouths, beating dead horses endlessly and denigrating anyone who disagrees with you. Often they good for a chuckle.