That isn't Git installing things though, that is third-party Git distributions bundling things along with Git.

I'm aware, which is why I phrased it like I did. A lot of folks don't know or understand the distinction when they're installing Git (or installing something else that happens to bring Git with it).

The overarching point is that the shell itself is not installing anything at shell runtime. E.g. it's the Git Bash installer, not opening `bash`.