Games, more than any other form of entertainment, offer skill challenges. As they've become more popular they've gotten better about offering spectacle also. Some people play games mostly for skill mastery, others play games mostly for spectacle. This is a more nuanced distinction than "hardcore" vs "casual" - which fails to capture skill mastery extremists who are barely even gamers because they only play one game, or spectacle extremists who could hardly be called casual because they make gaming their entire life.
Most people care about both, but may care more about one side or another. Some games cater to one side or the other, and some games, like Hollow Knight and Silksong, achieve excellence at both.