Frequently the type of content that gets syndicated via RSS is long form and non-commercial.
It turns out that these two properties produce a pretty good signal to noise ratio which filters out precisely the kind of trash that has ruined the web over the last decade or two (long form content at least has the possibility of teaching you something or presenting an idea with some kind of rigor; and since RSS isn't great at monetization, the worst offenders in media tend to deprioritize it).
Of course RSS is a very imprecise filter, but it's basically the antithesis of a Twitter or Facebook feed, where everything is short form and you tend to see whatever serves the platform's commercial interests (i.e. their definition of engagement).
This matters to me because at a certain point I realized -- I have basically never read anything short form on social media which enriched me in a meaningful way.
I have learned a lot from studies, reference works, long form analysis, and books -- basically all the quality knowledge I possess has come from one of these sources.
At best social media has given me occasional links to these things (scattered among an ocean of junk information).
It's mostly because of how RSS originated with blogs I guess, and who was involved in designing it. But for whatever reason it has been far more valuable to me than any other form of content syndication online.