Just like those complaining about curl|sh on Linux, you are confusing install instructions with source code availability. Just download the script and read it if you want. The curl|sh workflow is no more dangerous that downloading an executable off the internet, which is very common (if stupid) and attracts no vitriol. In no way does it imply that you can not actually download and read the script - something that actually can't be done with downloaded executables.
[0] https://github.com/marlersoft/zigwin32 [1] https://github.com/microsoft/win32metadata