The Alexandrian school is an anachronism. The text type theory was a fad and no one believes it anymore, so even if it were a real thing, it wouldn’t be relevant. Sainiaticus was not found in a garbage can (although its origin is suspicious in other ways and it’s likely a partial forgery.) The copyright justification is wrong. He’s right that copyright law is the cause for many translations, but the specifics he gives are schizo.

When he gets into specific variants, he’s being very speculative (arguably deceitful) in explaining why they exist. The point is to push a subversive philosophy that allows for increasing conjectural emendations. This accomplishes two things; it allows them to push new copyrighted editions every few years, which they make bank on. Secondly, it allows them to call the preservation of the text itself into question, because if these are the mistakes we *can* find, imagine all the ones we can’t! Bart Ehrman is big on that talking point, and you’re going to see a lot more of it

He’s facing the right direction, but his knowledge of the specifics is all over the place. I respect what he’s trying to do, but ultimately, anyone who looks into the details is just going to go in the other direction when they realize he’s playing fast and loose with the facts.