So you're upset because GitHub won't assume liability for your potentially illegal activity? Why not ask the EFF to setup a free service to host these sorts of files? They seem like the most qualified Org to do it.
GitHub makes judgment calls on what to censor: They deem a project name offensive, they deem some piece of code stolen (unless the NSA admitted to them it was legit, they had no confirmation), they deem publicly available data crawled from the web PII or harassment instigation.
Unless you do not classify these examples as censorship, it is what it is.
The objection stems from the fact that censorship is always a dominant issue raised in discussions about platforms for sharing and, while it's important to keep it in mind if you're the type of person who might share controversial or objectionable content, that is type of sharing is the minority.
If we were in an oppressive regime like China where state mandated censorship is the norm, then it would be a much more pressing concern. But for most of us, we're not under an oppressive regime and decrying the platform for censorship is on par with complaining that reddit won't let you dox people or flicker banned you for posting kiddieporn.