It's definitely worth learning. I had the damnedest time with docker until I went to a meetup and had someone ELI5 to me. And it wasn't that I wasn't technical. I just couldn't wrap my head around so many layers of extraction.
The guy was very patient with me and helped me get started with docker compose and the rest is history.
I'm like that. It feels like a total waste of resources, and introduces unneeded complexity for backup, updates, file access, networking and general maintenance.
I would take a deb repo over docker any day of the week.