No. Netflix is not only about sitting in front of a TV, even if the TV experience is still central for most households. It also works well on phones, tablets, laptops, and browsers, and many people use it for commuting, travel, and casual watching between larger-screen sessions.
The reason this misconception survives is that Netflix does have a clear centre of gravity. Its strongest case is still households that want one broad entertainment subscription rather than a specialist service built around one franchise or one narrow niche, which is why people reduce it to a narrower stereotype than it really deserves.