Maybe it will help to explicate what rubs me the wrong way about "corporate HR".
The facade of process masking Machiavellian reality is what rubs me the wrong way.
I'm always astounded by folks who don't understand that companies are feudal kingdoms and that all the stuff about processes and protecting people who are innocent/do the right thing is just hot air. And I've never been on the wrong side of HR, so this isn't a personal issue per se. But when I mentor new grads, I do make sure to find some time to explain how companies really work and stress that "getting along" with people is the most important skill.
I've always felt like the world would be a better place -- and workplaces would function better -- if Corporate HR was just honest: "this company is someone else's property, you have no rights to that property, we do what we want, so play nice and don't piss off the wrong folks unless you're ok leaving."
Most OSS projects aren't so dissimilar. I don't know about Rust, and suspect "Core" might have a different meaning here. But in most projects the core (aka primary) developers effectively own the project. Rules to the contrary are at best aspirational and at worst lies. If you disagree with the primary developers, it's much better the just fork the project than to imagine that there's some fair and rational process by which you will be able to plead your case and over-ride their edicts. Again, this isn't a value judgement. It's just a description of how reality works.