The big problem is that these studios are so afraid of risk, they don't even try anything different. Netflix, Amazon, HBO, Showtime, and the other streaming services do have more variety, which is why they are still around.
You can go a bit further into the problem, when they release 20 movies a year, three can do poorly, three can do really well, and fourteen of them can do "ok", meaning they don't make a lot, but they don't lose much either. The result is though, that people keep going to the movies because there is variety. Now, over the years, these studios have dropped how many movies they make per year, and that means they don't want to run a risk of even one movie being a flop. So, we get "more of the same", and that means, more people decide to just wait for it to become available to watch at home, because the options generally suck.
If you aren't willing to take a risk, then you will never get these movies that really amaze people because the story and characters are really well written. Nope, it's just bland garbage. Netflix cut back on their development, and will probably be feeling it before too much longer, because without a LOT of different content, many don't find enough to justify the monthly cost.