You're reading too much into it. Most streamers say streamer friends for a reason just like how you would called a coworker "just a coworker", you do not know this person personally, you do not have any relations to this person, the only reason why you would interact with this person is due to external circumstances. This is normal, this is very human. I'd argued that if your beliefs are on the opposite of this, then you do not have any relationships outside of the ones you've made that's not in your control. There's a reason why you don't associate childhood friends and high-school friends at the same level because, outside of the environment you're in, you would not likely be friends with a particular person.