I've seen this sentiment a lot, and it's always confused me a bit. I only use Jellyfin as well, I've never really seen the appeal of the *arr stack. I really don't see the appeal of having a firehose pointed at my Jellyfin instance, which requires like eight additional services that need to run.
> I've never really seen the appeal of the *arr stack
Automation I suppose. I only run Sonarr/Radarr, so two additional services. They both work exactly the same, so it's basically "configure once, run twice".
I eventually ran out of patience to find the right releases and what not, and now enjoy a life where I can just input the title, then return one hour later to everything setup for me. Any new episodes/movies will just be available automatically in Jellyfin next time I open it up on the TV. Helps that other people in the household are also able to use it, so we've got rid of all streaming services now.
I am mostly in the same camp but there are a few quality of life improvements that I recommend:
1. Overseerr - add tv/movies in one place
2. Custom feeds as import lists so that new, popular stuff is automatically getting added
3. Kometa (for Plex users) - custom collections via trakt and burning imdb/rt/metacritic scores into cover art
