That's debatable. I heard many people telling me they were confused by the fediverse because they had to pick a server to join. It's never been a problem with me but it's a common complaint.
There was a time when RSS used to be well integrated with browsers, you cannot get a lower barrier to entry than that. Sadly these days are gone.
As it stands now I'd say that the barrier to entry is pretty much similar. One the one hand users have to understand federation and have an account on a fediverse server. On the other hand they need to understand RSS and install an RSS reader or use an online solution
