An infrastructure tool's primary installation method should NOT be curl | sh

It should be. This is the least friction way to do so as server Linux operating systems still have not agreed on a common application format / package manager.

> It should be. This is the least friction way to do so as server Linux operating systems still have not agreed on a common application format / package manager.

Nowhere in your response did you mention security.

Unfortunately there is not a standardized way to securely install something.

or reproducibility

And after all that, the shell script only does

go install github.com/aspectrr/fluid.sh/fluid/cmd/fluid@latest

!