Can I ask you to educate me on why people need to know? I'm struggling to see your point. Surely people will benefit in some way from knowing how the Fediverse works under the hood, but not everyone needs to know, and as you can see this heavy emphasis on the Fediverse's inner workings is, instead, turning people away.
People are just very used to having things magically work, and I think that it's very natural for them to not want to deal with things that they need to make work. Many people never knew how Twitter or Reddit works under the hood, many never cared, but in the Fediverse it's suddenly brought up as a necessary thing. And I just can't see how that's necessary thing to use such a tool. All I'm saying is that UX-wise, many apps in the Fediverse could feel more seamless.
I hear you on the Fediverse being better in many many cases, but I also feel like many of the Fediverse's features are all but marketable to the average person. Add in the fact that people feel like there is a learning curve, and what you get is that people lose interest very fast.
I agree that it should be the default option. Thankfully you can change it from your account's settings, which is very nice.