I get what you mean, when you’re starting those 10% feel like a lot because it’s one of the main things you do when you first grab a system, but over time you install less and less stuff. Even if you’re not using Arch, the documentation there is really good, for example they have a Rosetta Stone for package managers, so if you know the command you want to do on one you can check the equivalent on other wiki.archlinux.org/title/Pacman/Rosetta so for example if you know in Debian based distros you would do apt-get install you’ll see that in Arch is pacman -S .
At the end of the day once you’re familiar with Linux the way you install packages is not that relevant to how you use your system. I currently have 3 machines, with 3 different distros, 2 of them look exactly the same and you wouldn’t be able to tell which is which, except one is Ubuntu (company issued laptop) and the other is Arch (Personal computer), sometimes I run Pacman on Ubuntu or apt on Arch and get a command not found error, but other than that they’re completely interchangeable.