Software freedom is the ability to do whatever you want with the code, for example, compiling it. I'm not saying there's any sort of license violation here, but it's not in the spirit of software freedom to "not supposed to install software [from source]"
Granted, but the freedom to ruin one's system is not a freedom I would promote.
Installing software from source is a good thing, you just need to go through the intermediate process of creating a package for your distribution first.
