technically, they don't recommend it. curl whatever | bash is one of the 3 possible method (first listed, I agree) but there are 2 other ways to install it. ot

technically, they don't recommend it. curl whatever | bash is one of the 3 possible method (first listed, I agree) but there are 2 other ways to install it. otoh, don't you think that without the unsecure one liner to install it, some people would complain about its lack ? Stating they can read the script before executing it anyway. Plus, it's not much less secure than cloning a repo and running 'make install' (in both case, one could read the script(s) but will unlikely do so).