I mean yeah there's a lot of stuff it does, but you can pick and choose what you want to use it for so it depends on what you would find useful - you don't have to use the full automation. I started just by using it as a read-only way to see what movies I had and in what qualities and keep things organized. You can use it as a manual interface to do one-off downloads - basically just as an interface to search 5 torrent sites in 1 place where you are still picking exactly what you want it to download. You can use it only to rename files to a consistent format. So there are a lot of ways to use the various features of sonarr/radarr besides automatic downloads. You're not forced to go all-in and out of the box it doesn't start automatically downloading until you enable that.

I think it's a common misconception that if you use sonarr/radarr you have to use download automation and set up trackers but it's not the case. It's a useful library organization tool even if you don't ever have it download anything.