I'm not convinced that's true at all. At this point most people have a plethora of devices that will get the exact same Netflix content on their TV. My TV has like 4 things connected to it right now that will (TV itself, ps4, chromecast, fire stick).
Yeah, but one of the main appeals of Switch is how portable it is. And when I carry around a device I expect it to not only provide games, but content consumption as well. Otherwise I can carry an ordinary tablet - it might be not ideal for games, but as a multipurpose device it would be superior.
Everybody is already carrying a much-more-multipurpose device with them everywhere they go (smartphone). Carrying around the sort-of-portable bit of the switch doesn't seem that much more convenient than having a laptop. Doesn't fit in your pocket.