...and if they can can get a high quality image that fills their field of view with sound that is powerful and convincing, that is good enough for some people to feel like they have actually experienced something, as opposed to just "watching" it.
Of course, most of the people who can afford to create these artificial experiences in their home somewhat convincingly can also afford to actually go to places and have the real life experiences to which you are likely referring. But then, a convincing presentation of something is the closest ANY person can get to "experiencing" events and places that can't possibly be experienced in real life.
I'd never grant that movies can be a substitute for actually going places and interacting with the environment and the people, especially as someone who usually chooses to spend disposable income on travel instead of upgrading the home theater. However with the right presentation and material, movies the can be life experiences you'll never forget.