Everybody has different viewing options that will vary depending on their lifestyle so it makes sense to offer different packages that have the options available to suit everyone. Not everyone wants to watch online, so why should they have to pay for the service if they are not going to use it.
Maybe your job means that you have to travel all the time so the same goes for people that want to watch online only.
Online films are now easy and there are packages that anyone can take advantage of without buying something that is not needed.  Check it out