@anonicus >Does this mean I can't enjoy a song if I don't have the stems for each instrument playing?
A song is merely a sequence of sound frequencies and if you have the actual sound file - there is nothing but copyright law that stops you from changing the song with ffmpeg and/or sharing copies to your neighbor.

>Or if I can't enjoy an anime if I don't have all of the cel frames or the file that has the source frames, voices, etc that are all spliced into separate files
A video is merely a sequence of frames with optionally a synchronized audio or subtitles - there is nothing but copyright law that stops you from changing video, audio and subtitles with ffmpeg and/or sharing copies to your neighbor.

>At this point, games are an entertainment, they maybe be software but the whole purpose is just to be entertained, its not something where I'm going out of my way and do any kind of work on.
Just because you personally may not currently want to do something doesn't mean it's legitimate to deny such freedoms for everyone.

A game cannot feasibly be modified without the source code and depending on how the game formats its data, control over the format handling software may be required to work out how the data is formatted.

I may not always want to modify a game (I sometimes actually do want to with certain free software games and carry out some modifications), but I may want to compile it from source so it runs on GNU/Linux natively without having to run it through wine.