You can read the script before installing. It's pretty straightforward—just grabs the appropriate binary from GitHub and puts it in /usr/local/bin.
Installing via package managers or installers also runs remote 3rd party code on your machine, so I don't see much difference from a security perspective. You should make sure you trust the source before installing anything.
Installing via package managers or installers also runs remote 3rd party code on your machine, so I don't see much difference from a security perspective. You should make sure you trust the source before installing anything.