system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why exactly movies are released on BR/DVD waaay after the release?

We live in digitized world, why aren't movies digitally available right after the release? AFAIK there's no other industry so withheld by one entity (movie theater). It's like games would not be available AFTER you can play them in arcades for couple of months first. 
I apologize if my question is confusing, English is my second language.
gpt
It is an agreement so that the movie studios can make more money. By having a tiered release it allows the studios (and industries) to make more money off the release of a movie.

If a movie was released in theaters, on BR/DVD, on HBO/Showtime, and on Netflix all at once, most everyone would just watch it on the easiest format available to them. Mostly it would be renting the movie and others would use a streaming service.

By releasing the movie in theaters first, all the people willing an able will pay a lot to see it in theaters. Later the BR/DVD is sold and people who can buy it. Lastly the movie is made available on streaming services. Doing this you even get some people to do all three: see it in theaters, buy the disc, and pay for a streaming service that has the movie.