My guess is it’s called sync because it’s the “do stuff directly relating to remote repository” sub-command, including remote repo search (--sync --search) and syncing package database/updating packages (--sync --refresh --sysupgrade). Notably, installing or updating a local package file you do with --upgrade.

A lot of package managers just have separate commands instead. It’s just a matter of organization.

To me that's part of the ideology I associate with Arch. If you actually use -h in pacman, I find that the help is presented in a nice and contextual way. You only need a few commands on a daily basis, and most of the other things you might need are easy to figure out when you need them.

In regard to -S being confusing, I think it's basically making the external operations map to how the software works internally. I feel like learning what the software is doing, rather than expecting the software to hide away the details, is also part of it. When you want to do more complex operations, or when something breaks, you'll have a better understanding of what happened.

I wouldn't mind a better interface, I'm not claiming it's the best it can be or even close to it, but I wouldn't want the improvement to come at the cost of obscuring how the software works. I don't want the commands categorized just by convenience rather than logic, or magic buttons that automatically perform a sequence of hidden operations. I want something I can learn, understand, commands I can dissect into their components, not something I'm expected to use in the 10 ways provided and hope it does what I need.

I see this in the same way as people tend to use git - some GUIs will offer convenient buttons with their own made up names, and when git throws an unexpected error, the user will have no idea what the error means, or what the software did to get there.

People often complain that git doesn't make sense. They might have a point in terms of it being unintuitive... But I find that with a general understanding how it's built and what the commands do, the complaints are often people trying to force the issue using the wrong tool for the job.

And, honestly, sorry for the rant. In the end it's just my opinion, I don't want to force it on anybody, I just started writing and kept finding things I wanted to elaborate on. If you're reading this, I hope you have a good day!

You can use an alias for that. Or even a wrapper script that intercepts that.

For example you could place this script in your PATH named idk mmm installpkg (install might be an issue for a name)

Which would do the following:

#!/bin/sh

sudo pacman -S $@

So when you type installpkg vim it will run sudo pacman -S vim

You can repeat that for pacman -Syu, pacman -Rsn, etc. You can even replace pacman for your aur helper instead. (remove the sudo if you will use an aur helper instead).