A casino is a machine that transfers wealth from poor, foolish, gullible, sad, unfortunate people directly to the pockets of casino owners.
Lest us not forget the origins of prohibition where women were collectively extremely upset about their husbands constantly going out and spending their salary on drinking instead of actually buying food and etc for the family.
Understanding math isn't enough I think it is largely emotion driven. Like a fun thing to do, not work.
There are also some games with accumulating jackpots that might turn ev > 1.