That’s just because someone went through that pain for you and scripted and packaged the entire procedure and rolled up most of the dependencies and their bills systems. I’ve done it from the official build directions without containers or prebuilt dependencies and “royal pain in the ass” is an understatement.
That’s one nice side effect from the push to convert dependencies/components to pure rust, one at a time. Even if it doesn’t go all the way, each step hugely simplifies the build process and minimizes the list of (recursive) dependencies.