The counterintuitive bit you're pointing out is an artifact of law, not their political opinion. If you don't care about copyright you use a license that protects you from copyright claims while giving rights to others. Companies that rely on public domain or open source software can't legally use the code until it has a suitable license, the absence of a license being that the owner still holds those rights. So the only way to hold their position is to do what they're doing. More broadly they're also saying they don't believe any of this shit is enforceable so they denigrate their own license but provide it for your sake.