When reviewing the contents of the compressed archives, for most platforms (linux, windows, solaris on 8), the top level directory is a folder with the name of the jdk version. For the macOS builds, the top level folder is named "." and there is a second level folder with the name of the JDK version.

E.g. for 17.0.16+9

On linux-x64 you get:

jdk-17.0.16_linux-x64_bin.tar.gz
-->jdk-17.0.16
---->bin
---->conf
---->etc..

For for macOS-aarch64 it goes:
jdk-17.0.16_macos-aarch64_bin.tar.gz
-->. ( <--the extra folder )
---->jdk-17.0.16.jdk
------>Contents
-------->Home
-------->MacOS
-------->etc.

Downloading and uncompressing the tar.gz "ignores" the extra "."