In regards to streaming and content creation platforms, i largely agree - it's more akin to improv theatre with one artist, but the kind where you could affect their act in subtle ways.
> It's still delusional thinking you can have a 'relationship' with someone on the other end of a screen that you are never going to meet in real life.
With this, however, i disagree. It's old fashioned to think that friendships can only happen in meat space. Plenty of people actually prefer online and remote communication in many circumstances, since those can offer a way to meet people from wildly different cultures or with similar interests, whereas for others it's a great way to keep in touch with friends who are a long distance away.
For example, i currently live about 60 km from the nearest city in which I could find a significant amount of fellow developers, yet this very platform allows me to see what people all over the world keep themselves busy with. There is definitely a community aspect there.
In regards to personal relationships, some of my online friends are people with whom I can be more honest about my life circumstances than those that i face every day - since they could also have a larger impact on my life with their reactions and differing views.