Is thinking that we can only win through luck, even in games that use skill, basically a declaration of defeat?
No, knowing and saying that the game is based on luck is just a gesture that the player knows that in gambling nothing is set in stone. It is not a declaration of defeat because if it is, then they will not gamble to try their luck at all.
I keep seeing forum users saying there’s no way to win in sports betting because of the house edge, the juice, and that casinos or sportsbooks won’t allow players to be profitable long term.
You could have quoted the post you seen here, that way readers can verify if what you are saying is the same context the post is.
So if we think that way, that our wins are just luck and temporary, what do we even call that mindset?
Mindset that knows anything is possible in gambling and at the same time to remind us to be a responsible one since the statement shows and tells that engaging in gambling if not controlled can ruin our financial capability.