Reddit is more akin to Wikipedia than it is to Facebook at this point for many people. Yes, much of the popularity comes from interacting with others but it's also become a hive of up-to-date information and opinions for hobbies, for trades, etc.
If I start a new hobby I don't need to go find the 10 year old abandoned page or the SEO manipulated AI generated summary. I just go to /r/hobby. New espresso machine? /r/espresso. I want to know what 3d printer to buy? /r/3dprinters. Damage to my roof? /r/roofing. I don't know how to do some maintenance on my house? /r/homeowners. I need to buy a new car but I don't know how to get a good deal? /r/askcarsales.
There's a lot more at play here than the stale "social media bad, algorithms manipulate society" take.