I’m sorry, but do you have a source for it being that fast? I haven’t seen any mention of that anywhere else, at least when it comes to this area of encryption

You also don’t specify what kind of hardware would be needed to make that fast, how fast you’re thinking, or even what type of encryption you’re talking about, all of which are pretty important

I’m not sure this fact would make much of a difference here anyway, because it’s not like you’re ever scanning the entire disk in the first place, you’re trying to decrypt a specific string in the header in a specific place even if you’re just unlocking it normally, and if that really was so insecure, it would be pretty well known and nobody would ever use it