Considering:

- Not everyone is proficient in bash.

- Some install scripts can easily go on for thousands of lines, especially if they are designed to work with multiple distro or architecture, or both.

- Said install script might be integrated deep down into someone else's build pipeline.

- ... that's assuming they aren't the type that would blindly download and run random exe from the web in the first place

Pretty common, I would say.

Quite so. A quick example from k3s installation page (https://docs.k3s.io/quick-start):

``` curl -sfL https://get.k3s.io | sh - ```

Nobody reads the source code of all software they are running.

My own estimations and observations say - 80% of programmers do. It's called "great DX" nowadays

Ever install docker on a pet Linux box? That script saves a lot of time.

It's like 80% of non distro Linux installers