Casino games focus on playing against the house, like spinning the roulette...

https://judahssuperchat.swiftnestly.com/posts/why-does-gaming-mean-video-games-sometimes-and-gambling-other-times

Casino games focus on playing against the house, like spinning the roulette wheel. Gambling covers all games of chance or skill where money’s at stake, including betting on football matches. Betting specifically means placing wagers on outcomes