ender The getting involved page is meant for anyone who would like to participate and most people are not developers so what would be the point to scare them with technical things they wouldn't understand ? The page clearly mention under the IRC section "#Solus-Dev - Development-related discussions.".
People who'd like to help on technical things are supposed to have a technical background (depending on what they would like to do). If they don't know anything about the major development platforms, bug trackers, if they can't find repositories, read docs, etc.. They are probably not ready for participating in such projects yet and need some more time to learn and see how the open source world works.
It does it's the packaging section of the getting involved page that you even link at the end of your post!
Submitting a pull request is a very basic prerequisite for participating in any open source project. How could people contribute to code if they don't even know how to submit changes? There are tons of tutorials on the web about using git or github.
ender guess the Solus team doesn't want to have to handle too many external contributions, or maybe the process is already obvious to seasoned devs (like, if one doesn't know how to do it, one shouldn't do it)
Yes, developers know these processes, they are very common and widely used. But no if they don't know how to do it doesn't mean they shouldn't use them. They should first learn.