Right, so you don’t know what you’re talking about and shouldn’t speak authoritatively on the subject.
I drive a car every day, but that doesn’t mean I can speak authoritatively on how its transmission works.
But, I am a senior SecOps engineer (like a systems engineer but also a cyber security expert) working mostly with Linux, and I can authoritatively say that you’re mistaken about Valve’s ability to block piracy in Linux.