It is the oldest distribution and tries to not modify any source so as to keep things pure to the vision of the maintainer of whatever software you have installed. It doesn’t hold your hand, there is no auto find and install dependencies for example, but then again that’s one of its advantages, you know what you have installed and why. I picked up a raspberry pi a while back and gave their Rasbian a try. booted it up and ran its update and saw a Microsoft repo get added and stuff from it starting to download so I unplugged it real quick and put Slackware-arm on that microSD card and never looked back at the rasbian/debian stuff again.
It already has all that. And the reason it doesn’t do it auto is so that you can yourself, so you know whats going on. I’m running nextcloud at home for example and apache, mysql, etc were already there so it was like 30 minutes to download and install nextcloud and set it up, very simple, easy and fast to spin up new servers. There are third party package managers that do like sbopkg so you still can if you want.