They're different experiences. I don't need Tetris or PacMan in VR. Conversely, Half-Life 1/2 etc are not remotely intense as Half-Life Alyx. In the first 2 you're watching a movie. In the later you're in the world of Half-Life
The reason movies exist isn't simply "immersion", it's a different experience than reading a book.
Examples:
- Before going on a trip, pre-visiting the destination in Google Earth with VR is very spatially informative & makes directional intuition memorable upon arrival at the real world destination.
- Virtual role-play with environmental cues that cause make-believe to be ever more real.
But most people don't need this very often. Picking up a book or throwing on some earbuds to listen to a book are far more frequent and compatible with simultaneous other activities. VR feels the same--a high-demand focused experience that is infrequently worth the effort.
I think that the relatively low living space area for most of the world is a huge strain on VR adoption.