Thanks for your response Adi Yagil. I believe that in UX design there are two ways you can go: Give the user more, or less control over functionality. I’ve found that, although with good intentions, giving the user a lot of flexibility, control and choices many times backfire and decreases the satisfaction of the user. People want to be in control, but too much control can be overwhelming. In a way I am here explaining the paradox of choice, that more is not always better. Of course, some people like to have more choices and control over their experience but I think the general public are less inclined to gain an increase in marginal satisfaction from a grater array of choices and features. One (perhaps nerdy) example is Linux versus Mac. In Linux you are able to customize and tweak every feature of the OS, unlike Mac. To the general public which is not as tech-savvy as the Linux user might be, all these added features will only cause confusion and discourage them from using the OS, whereas a Mac excels due to its simplicity. That is what Netflix is doing here too — I believe they are trying to reach out to the larger crowd of users.
Furthermore, as I stated in the article this feature has not yet been rolled out to all platforms yet. It probably will be in the future though. Perhaps it will/is possible to turn off this features in the settings? I have not explored this and maybe Netflix should consider implementing this functionality to allow users to opt out of viewing previews. It is totally understandable that some might think that it is kind of a spoiler!