Because it’s just unnecessary. Due to their nature, you want a few services reachable from anywhere, anyways. There’s no reason for the average consumer to acquire hardware for this purpose. Just rent the service or the hardware elsewhere, which also reduces upfront cost which is ideal in situations where you cannot know whether you’ll stick with the service.

Again, it’s either extreme that’s absurd. You don’t need your own video streaming platform for example. In rare cases, sure. For the vast majority of people, Netflix is a much service however.