Nobody is forcing you to. Plenty of folk have Netflix for access to favorite classics or TV series when they have time to. New titles are only added value for them.
In Spain Netflix has a VERY limited classic (or contemporary for that matter) catalog. Is only worth paying it for series IMHO.
That's going to vary wildly from country to country depending on what deals they're able to actually get for content. In the US it's pretty good for watching old shows.
US Netflix has a decent collection of Korean movies for example, where new movies have been added on a regular basis for the past year or so. It's just that the Hollywood content is most prominently displayed on the home page, but if you know what you're looking for, then there may be a few worthwhile sub-categories available for you on Netflix.