Curious about source code

I’m sure this has been asked a million times. But why don’t we have the source code for cataclysm?

Should it not all be on the disc you play the game with? I know you can’t see all the files, but if you go in on windows and tell it to show hidden files, you can see all the files on a particular CD.

Would this not work? You wouldn’t even need installation to view the files on the CD. I lifted some music from an iPod to a computer this way because Apple music or itunes or whatever wasn’t working.

That would be compiled code, not the source code…

What would be more useful is the code from before compilation.