I see no reason to not use both. Got a show you're watching that has new releases? Have Sonarr track it and auto download them as they release. Want to try a new show but not sure you'll like it or just a single season? Debrid.
I will say, Jellyfin with Infuse on apple tv is rather easy to use for non technical people where they would struggle with stremio a little more.
Still a far cry from the early XBMC/Kodi days where you had to manually try like 20 sources before you could watch both options really are great
You probably unknowingly break multiple laws a day settle down