I'm not. Absolutely the onboarding experience can be improved.
The problem is you're losing the plot, here.
The original commenter complained about having to "read up on what rights server admins have over my account, why I should choose one versus another, which servers are de-federating which others, et cetera."
But you don't have to do that if you don't want to. If you're already willing to blindly join Reddit, you can blindly join mastodon.social.
And the app is already now driving people to do that if they really don't care (which is what the OP claims).
So this is already being improved (and yes, can absolutely be improved further).
Forced choices drive away users. People don't like making decisions without context because they feel like scams. That's why uptake is slow almost a decade into federation. The UX model is bad.
Ah, cool, so you just wanna complain. Got it. Carry on!
Federation might run 100x better if instances were suggested based on geographic proximity rather than semantics, a concept which makes intuitive sense to people. 'Pick from a random and inconsistent list of servers in no particular order' is like demanding that people who are considering taking a holiday decide where to eat lunch after they arrive before they buy the plane ticket.